Hence why OP was specifically talking about WinUI 3 (which is indeed at version 1.6.1 as of right now).
Re:We're forking Flutter
by c-hendricks on Wednesday October 30, 2024 @09:56AM
(#41994818)
Windows App SDK seems to be at 1.6.1, which includes WinUI 3.
> At this time, there are two generations of WinUI: WinUI 2 for UWP and WinUI in the Windows App SDK (WinUI 3).
> https://learn.microsoft.com/en-us/windows/apps/winui/