diff --git a/eng/pipelines/corefx-jitstress.yml b/eng/pipelines/corefx-jitstress.yml
index 6b05bd9b28b8..5bba5f191e06 100644
--- a/eng/pipelines/corefx-jitstress.yml
+++ b/eng/pipelines/corefx-jitstress.yml
@@ -16,26 +16,26 @@ jobs:
     jobTemplate: build-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
 
 - template: /eng/platform-matrix.yml
   parameters:
     jobTemplate: test-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
     helixQueueGroup: corefx
     jobParameters:
       testGroup: jitstress
diff --git a/eng/pipelines/corefx-jitstress2-jitstressregs.yml b/eng/pipelines/corefx-jitstress2-jitstressregs.yml
index 397dca32ab8d..13644a033ed5 100644
--- a/eng/pipelines/corefx-jitstress2-jitstressregs.yml
+++ b/eng/pipelines/corefx-jitstress2-jitstressregs.yml
@@ -16,26 +16,26 @@ jobs:
     jobTemplate: build-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
 
 - template: /eng/platform-matrix.yml
   parameters:
     jobTemplate: test-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
     helixQueueGroup: corefx
     jobParameters:
       testGroup: jitstress2-jitstressregs
diff --git a/eng/pipelines/corefx-jitstressregs.yml b/eng/pipelines/corefx-jitstressregs.yml
index 24fd87390297..e1c5300f4140 100644
--- a/eng/pipelines/corefx-jitstressregs.yml
+++ b/eng/pipelines/corefx-jitstressregs.yml
@@ -16,26 +16,26 @@ jobs:
     jobTemplate: build-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
 
 - template: /eng/platform-matrix.yml
   parameters:
     jobTemplate: test-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
     helixQueueGroup: corefx
     jobParameters:
       testGroup: jitstressregs
diff --git a/eng/pipelines/corefx.yml b/eng/pipelines/corefx.yml
index 05f2fc7ccebf..b99a9f6928d6 100644
--- a/eng/pipelines/corefx.yml
+++ b/eng/pipelines/corefx.yml
@@ -16,26 +16,26 @@ jobs:
     jobTemplate: build-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
 
 - template: /eng/platform-matrix.yml
   parameters:
     jobTemplate: test-job.yml
     buildConfig: checked
     platforms:
-    # TODO: add Windows_NT_arm64, when we have hardware available, and .NET Core supports it. Note: platform-matrix.yml needs to enable a Helix queue for this.
     - Linux_arm
     - Linux_arm64
     - Linux_x64
     # TODO: re-enable Windows_NT_arm when https://github.com/dotnet/corefx/issues/38863 is resolved
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
     helixQueueGroup: corefx
     jobParameters:
       testGroup: outerloop
diff --git a/eng/pipelines/r2r.yml b/eng/pipelines/r2r.yml
index 24f1f2ef5fce..ae1d2f2f056f 100644
--- a/eng/pipelines/r2r.yml
+++ b/eng/pipelines/r2r.yml
@@ -13,6 +13,7 @@ jobs:
     - Linux_x64
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
 
 - template: /eng/platform-matrix.yml
   parameters:
@@ -24,6 +25,7 @@ jobs:
     - Linux_x64
     - Windows_NT_x64
     - Windows_NT_x86
+    - Windows_NT_arm64
     helixQueueGroup: ci
     jobParameters:
       testGroup: outerloop
diff --git a/eng/platform-matrix.yml b/eng/platform-matrix.yml
index 21f25882f5a4..e54f92bdf676 100644
--- a/eng/platform-matrix.yml
+++ b/eng/platform-matrix.yml
@@ -273,7 +273,7 @@ jobs:
 
 # Windows arm64
 
-- ${{ if or(containsValue(parameters.platforms, 'Windows_NT_arm64'), eq(parameters.platformGroup, 'all')) }}:
+- ${{ if or(containsValue(parameters.platforms, 'Windows_NT_arm64'), in(parameters.platformGroup, 'all', 'gcstress')) }}:
   - template: ${{ parameters.jobTemplate }}
     parameters:
       ignoreDependencyOnBuildJobs: ${{ parameters.ignoreDependencyOnBuildJobs }}
@@ -282,7 +282,8 @@ jobs:
       osGroup: Windows_NT
       osIdentifier: Windows_NT
       helixQueues:
-      # TODO: Consider adding Windows.10.Arm64.Open here if capacity is enough for handling both Windows_NT/arm and Windows_NT/arm64 testing
+      - ${{ if and(eq(variables['System.TeamProject'], 'public'), in(parameters.helixQueueGroup, 'pr', 'ci', 'corefx')) }}:
+        - Windows.10.Arm64v8.Open
       - ${{ if eq(variables['System.TeamProject'], 'internal') }}:
         - Windows.10.Arm64
       ${{ insert }}: ${{ parameters.jobParameters }}