Edit: I think I misread your comment.

~~GrapheneOS uses its own privacy focused location service. There is no need for root privileges. https://eylenburg.github.io/android_comparison.htm~~

Using microG location services requires root.

I don’t think you can. You can only stop internet connections made by Google with the RethinkDNS app (or similar). Changing the location service usually requires flashing a different OS like GrapheneOS.