Pavestone2734 Is it because of the mobile network?
I suspect those apps are "helpfully" working from a SIM card's country code, which apps are allowed to know.
Pavestone2734 Is there a way to prevent this?
You might complain to the app authors (and perhaps experiment with removing your SIM card).
Also, I believe that the GrapheneOS team has a long-term goal of adding more controls to manage standard Android features that can be useful for fingerprinting.