[Seirdy]

Depends on the ROM. AOSP barely has any Google on it compared to "stock" Android; it uses Google services for system resources like DNS, time synchronization, cert stores updates, etc. This is configurable. Of course, it uses Google servers for updates.

I believe that webviews and such use Google Safe Browsing.

AOSP doesn't have Google Play Services at all. There's a trivial amount to "de-google".

I'd recommend looking into GrapheneOS too once it gets 5a support.

[atatatat]

If you're looking for security today, you can get away with a cheap 3aXL web installed with Graphene, for under 150 USD.

[privacyisntdead]

Link?

[greesil]

Like Pixel 5a?