When she is using her Faraday bag, she has complained about missing calls sometimes, but generally her security has been fully protected and we have tricked google many times.

If tracking is such an issue, then the best trick is to not use a Google (Android) smartphone at all.

No one is forced to buy Google (Android) smartphones.

There is always a choice.

You can buy even classic phones too.

Currently I use a Motorola Moto G22 (Android 12) smartphone.

I have not used a Faraday bag so far, and probably I will not use it in the future either, but of course I know what it is.