Hi @NidhiSood9 I have found a solution to this problem. All I had to do to get this to work is to add a few packages to the main project csproj.
These are the packages that I added:
Once you’ve added these packages, do a clean, delete bin and obj, launch visual studio, build the project and run it.
This resolved my Collectionview IsGrouped issue for iOS 18.0, I hope it resolves yours too.
MobileExp3rt
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Same issue and none of the given online solutions work. Have you found a solution for this yet?