i dont know what you mean by baked in really. all services are packages i guess and a quick google search says stuff like that at least exist at some point, e.g.https://github.com/tutyamxx/androidtv-debloat-script
i wish op the best of luck to escape telemetry hell.
Adb is just an interface between computer and phone, the packages it lists may not be every system component, you can add anything in at kernel level, or also just not list it in that interface.