For many Android devices you can also install e-Foundation.
It’s a Android ROM without Google attached. No polling/keep-alives with Google at all.
It uses MicroG to get apps working for some Google support. But not all apps seem to work fine. Better check the list, before you get disappointment.
Their website
Install e-foundation for the Poco X3 Pro
https://doc.e.foundation/devices/vayu
Downloads: Recovery + ROM image
https://images.ecloud.global/dev/vayu/
How to install:
https://doc.e.foundation/devices/vayu/install