Same issue and none of the given online solutions work. Have you found a solution for this yet?

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.