Description

While testing the issues, I found that in CollectionView2 in both iOS and Mac, it takes large horizontal space

CollectionView 1

CollectionView2

Steps to Reproduce

Repro the issue using the below one in hostapp
https://github.com/dotnet/maui/blob/main/src/Controls/tests/TestCases.HostApp/Issues/Issue27229.xaml

Link to public reproduction project repository

https://github.com/dotnet/maui/blob/main/src/Controls/tests/TestCases.HostApp/Issues/Issue27229.xaml

Version with bug

10.0.20

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, macOS

Affected platform versions

iOS 18, Mac 26

Did you find any workaround?

No response

Relevant log output