FWIW, I have a recently purchased Nokia 7.1 which is part of the Android One scheme (running Android Pie). This was through a legit high-stret UK retailer so not grey-import or anything. I installed NoRoot Firewall as suggested in another comment here. So far NoRoot Firewall has not detected any activity from anything unusual running in the background (either idle, screen-on, or charging). What was weird though was t…
I'll keep running foir a few more days (I cant use my usual VPN at the same time as NoRoot Firewall so dont want to run indefinitely) and udpate if anything else happens.