diff --git a/src/libraries/System.Net.Http/ref/System.Net.Http.cs b/src/libraries/System.Net.Http/ref/System.Net.Http.cs
index c0931763c8fb47..134fcbd062a3d3 100644
--- a/src/libraries/System.Net.Http/ref/System.Net.Http.cs
+++ b/src/libraries/System.Net.Http/ref/System.Net.Http.cs
@@ -93,13 +93,21 @@ protected override void Dispose(bool disposing) { }
         public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute("Uri")] string? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken) { throw null; }
         public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content) { throw null; }
         public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken) { throw null; }
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("ios")]
         public System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request) { throw null; }
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("ios")]
         public System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption) { throw null; }
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("ios")]
         public System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken) { throw null; }
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("ios")]
         public override System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) { throw null; }
         public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request) { throw null; }
         public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption) { throw null; }
@@ -159,10 +167,10 @@ protected override void Dispose(bool disposing) { }
         // Attributes are commented out due to https://github.com/dotnet/arcade/issues/7585
         // API compat will fail until this is fixed
         //
-        //[System.Runtime.Versioning.UnsupportedOSPlatformAttribute("android")]
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
-        //[System.Runtime.Versioning.UnsupportedOSPlatformAttributeUnsupportedOSPlatform("ios")]
-        //[System.Runtime.Versioning.UnsupportedOSPlatformAttributeUnsupportedOSPlatform("tvos")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("ios")]
+        //[System.Runtime.Versioning.UnsupportedOSPlatform("tvos")]
         protected internal override System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) { throw null; }
         protected internal override System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) { throw null; }
     }
@@ -227,7 +235,9 @@ public HttpMessageInvoker(System.Net.Http.HttpMessageHandler handler) { }
         public HttpMessageInvoker(System.Net.Http.HttpMessageHandler handler, bool disposeHandler) { }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
+        [System.Runtime.Versioning.UnsupportedOSPlatform("ios")]
         public virtual System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) { throw null; }
         public virtual System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) { throw null; }
     }
diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs b/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs
index 22d22ed58cc749..482c146f7c7855 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs
@@ -441,19 +441,27 @@ public Task<HttpResponseMessage> DeleteAsync(Uri? requestUri, CancellationToken
 
         #region Advanced Send Overloads
 
+        [UnsupportedOSPlatform("android")]
         [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("ios")]
         public HttpResponseMessage Send(HttpRequestMessage request) =>
             Send(request, DefaultCompletionOption, cancellationToken: default);
 
+        [UnsupportedOSPlatform("android")]
         [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("ios")]
         public HttpResponseMessage Send(HttpRequestMessage request, HttpCompletionOption completionOption) =>
             Send(request, completionOption, cancellationToken: default);
 
+        [UnsupportedOSPlatform("android")]
         [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("ios")]
         public override HttpResponseMessage Send(HttpRequestMessage request, CancellationToken cancellationToken) =>
             Send(request, DefaultCompletionOption, cancellationToken);
 
+        [UnsupportedOSPlatform("android")]
         [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("ios")]
         public HttpResponseMessage Send(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationToken cancellationToken)
         {
             CheckRequestBeforeSend(request);
diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/HttpClientHandler.AnyMobile.cs b/src/libraries/System.Net.Http/src/System/Net/Http/HttpClientHandler.AnyMobile.cs
index da3b0b2f396b05..d0c27f5280f95b 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/HttpClientHandler.AnyMobile.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/HttpClientHandler.AnyMobile.cs
@@ -759,9 +759,9 @@ public int MaxAutomaticRedirections
         // Attributes are commented out due to https://github.com/dotnet/arcade/issues/7585
         // API compat will fail until this is fixed
         //
-        //[UnsupportedOSPlatform("android")]
+        [UnsupportedOSPlatform("android")]
         [UnsupportedOSPlatform("browser")]
-        //[UnsupportedOSPlatform("ios")]
+        [UnsupportedOSPlatform("ios")]
         //[UnsupportedOSPlatform("tvos")]
         protected internal override HttpResponseMessage Send(HttpRequestMessage request,
             CancellationToken cancellationToken)
diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/HttpMessageInvoker.cs b/src/libraries/System.Net.Http/src/System/Net/Http/HttpMessageInvoker.cs
index c9e55048c802ad..780cd157672bc5 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/HttpMessageInvoker.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/HttpMessageInvoker.cs
@@ -28,7 +28,9 @@ public HttpMessageInvoker(HttpMessageHandler handler, bool disposeHandler)
             _disposeHandler = disposeHandler;
         }
 
-        [UnsupportedOSPlatformAttribute("browser")]
+        [UnsupportedOSPlatform("android")]
+        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("ios")]
         public virtual HttpResponseMessage Send(HttpRequestMessage request, CancellationToken cancellationToken)
         {
             ArgumentNullException.ThrowIfNull(request);