Looks good to me using latest Nightly 138.0a1 on Windows 10, Windows 11 and Windows 11 ARM. The pin to taskbar notification is now shown and selecting to pin will work just fine.
Bug 1949263 Comment 6 Edit History
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Looks good to me using latest Nightly 138.0a1 (msix) on Windows 10, Windows 11 and Windows 11 ARM. The pin to taskbar notification is now shown and selecting to pin will work just fine.