Do you mean your email inbox ? If so, if you're not signed in, there's nothing here for Google to know. If you're using gmail, obviously when you access your gmail from your phone, Google would know. Either you're using gmail or not. Obviously, emails you send to other gmail users, Google has access to them through other's inboxes, but that is completely independent from your device choice. So I'm not sure what exactly you're worried w.r.t. your device setup.

> texts

If you're not signed in, but using Google backed RCS as SMS/text, then Google won't have access to your message if using end-to-end (for non-group messages). If you're using group messages, they are not end-to-end encrypted.

> right to be forgotten

I'm not sure what you mean, w.r.t. phone device. Care to elaborate ?

> geofencing warrant grab all’s

If you're doing Google searches, they would be subject to geofencing warrant, albeit Google won't know who you are, just that a particular type of device with a particular ip address issued a particular query (and if you shared your location with Google, they would know more fine-grained location but obvious assumption here is you wouldn't do that), but that's no different from any device you use.