iOS Share Extension - sharing *to* my app

[ThisIsTotalCrap]

Has anyone been able to get iOS Share Extension working in MAUI? I have it working correctly in Xamarin. I can get my app with a share extension project to build in MAUI, but the share option never appears. To be clear, I'm talking about sharing to my app, not sharing from my app (i.e. not iShare):

I found Vladislav Antonyuk's demo (https://vladislavantonyuk.github.io/articles/Extend-.NET-MAUI-application-with-iOS-Extensions/) but can't get it to compile with .NET 7+