COMException on pin app to taskbar

[Marv51]

Describe the bug
I'm trying to offer a button in my app to pin the app to the taskbar. The UWP Api for this is TaskbarManager.RequestPinCurrentAppAsync. This worked in UWP but in WinUI 3 with CsWinRT and .net 5. This fails with a System.Runtime.InteropServices.COMException, with message "Interface not registered (0x80040155)".

To Reproduce

bool isPinned = await TaskbarManager.GetDefault().RequestPinCurrentAppAsync();

Expected behavior
Should work as in UWP, it should show a user confirmation dialog and pin the app to the taskbar on confirmation. If this fails it should return false.

Version Info
Windows App SDK 0.8.5

[jlaanstra]

This is called out as not supported in WIndowsAppSDK 1.0: https://docs.microsoft.com/en-us/windows/apps/windows-app-sdk/migrate-to-windows-app-sdk/what-is-supported

[angelazhangmsft]

@Marv51 this is currently not on the roadmap for Windows App SDK, but this issue/feature proposal has been opened so feel free to leave feedback: microsoft/WindowsAppSDK#1648