Very scary stuff.

Wondering how the android alternatives deal with this, does it work on grapheneos, e os, calyxos?

*Billion

I think home assistant + the home assistant app will do this, although i have disabled map etc from HA so I dont have 1st hand experience. You need to self host HA and establish a connection either with nabu casa cloud or a vpn setup (it’s quite easy to set up wireguard on HA)