In the absence of privacy-focused ROMs for my tablet, I settled on flashing an AOSP GSI without Google apps. TrebleDroid to be specific, which is essentially vanilla AOSP, but with some additional drivers to maximize compatibility. Compared to privacy-focused ROMs like GrapheneOS, what exactly does AOSP send back to Google?
Hey there, for starters A-GPS, stun, secure DNS, and several other preconfigured servers default to Google. Some of these can be changed with ADB. Check out a guide on de-googleing LineageOS for a more complete list. It’s not AOSP, but close enough. There are also Google servers configured in the sources. How valuable those connections are, depends on your threat-model. If you’d like a paranoid GSI, check out LeOS. It’s probably the most complete treble-compatible option. AOSP by default, isn’t very private.