I’ve created another app to address confusion with the application type.
While both applications shown as “Native” the new one indeed doesn’t have the “Credentials” tab:
Also old app has an additional section in settings:

Despite using the new application, I still have the same issue with FB login. I was also able to reproduce the issue using the source from original @andrea.chiarelli repo: GitHub - auth0-blog/dotnet-maui-auth0-app
I’ve suspected that the issue is with my app settings, but here is the report of, I suspect, same issue: crash: login -> logout -> login again · Issue #9 · auth0-blog/dotnet-maui-auth0-app · GitHub