You can use firefox. Or degoogled andoid rom. Google spies on your phone mostly through their apps: chrome, maps…

Andoid by itself is very privacy focused operating system.

Check c/degoogle on how to remove google stuff from your phone. Also check privacy guides about vpns: https://www.privacyguides.org/en/vpn/

They are mostly not what they are advertised as. You should check tor. And maybe /e/os