The specified child already has a parent. You must call removeView() on the child's parent first." Facing this issue
Solution 1:
Seems like this was reported and according to the comment in there, this should be fixed for preview 11+: github.com/dotnet/maui/issues/3511 Which VS2022 have you installed?
Installing Visual Studio 2022 v17.1 Preview 2 should give you .NET MAUI Preview 11 which should resolve the issue.