How do you read your email?

That doesn't stop or turn off google services, or services framework, or safety scan, or scanning your images, or reading your contacts and phone logs, what apps you use, when you use them, biometric data, location data, etc.

You can mitigate against these by limiting permissions or appops with adb or shizuku enabled programs.

Uninstall/disable as many google apps, components, and services as safely possible.

Use a DNS filter to block Google from sending data, DNS rebinding, and using mdns for internet.

Or go all the way and use graphene or similarly degoogled OS.