Documentation Request, does `microG` have provide any functionality without internet connection

Is your feature request related to a problem? Please describe.
I want to minimize network connections, and I want to know if microG can provide any additional functionally even when network blocked (e.g. with datura firewall)

Describe the solution you'd like
Create a Wiki page indicating which features require an internet connection and which features work without an internet connection,

Describe alternatives you've considered

1. maybe extend an existing page like https://github.com/microg/GmsCore/wiki/Google-Network-Connections

Additional context
no_response

Thanks!

Start by reviewing the existing Google Network Connections wiki page linked in the issue and identify the microG features it covers. Document which features require an internet connection and which continue working with network access blocked, either by extending that page or creating a related wiki page.