Any of several alternative OSs have small-to-no ties to Google, though Google is a heavyweight in the Android Open Source Project (AOSP).
E.g. my phone runs GrapheneOS, and it is doing that while I am not logged in to a Google account, running any Google-branded software, or seeing any pings to the panoply of xxx.google.com sites.
Check out CalyxOS or DivestOS as well.
Okay, but did you buy it like that or did you put in work to de-Google your phone? You mention GrapheneOS. Is your phone manufacturer Google? Do you run Google Play Services?
Bought a stock p5a, stuck on Graphene through the web installer, added apps from F-droid and Aurora. No Google stuff. A hell of a lot of apps run without even installing the Google services framework, and Aurora sure helps: anything requiring GSF is noted in the app descriptions.