Razor+C# Completion issues on particular Maui repo

[phil-allen-msft]

1. Boot VS Code with C# Extension and C# Dev Kit
2. Clone and open https://github.com/dhindrik/TinyInsights.Maui
3. Open a .razor file and start trying to type C# code.

RESULT:
C# completion doesn't seem to work as expected

EXPECT:
If the items in the collection that First() is applied to have sub properties, the sub properties should be available, etc., such that C# completion works as expected.