Meta/Facebook preinstalls an app called Meta Services (previously Facebook services) on a very large percentage of android devices (I've never used one without it) and while they claim it helps updates and synchronisation between different meta apps, it is very suspicious. Why preinstall it on devices of people who will potentialy never use a single meta app?
Go to your app list/app management and show system apps and find anything with the words "meta" or "Facebook" then turn off network access for those apps (if you can) and disable them. (eg. Meta app manager, Meta app installer).
Edit: Looking around I have found several people complaining that this app is using their ram for 10 hours a day even though they don't use anything Meta. That's even more suspicious.
I like it because it stays out of my way, for the most part. I've been a modder sinve the Cyanogen days, and the windows.phones before that. I like lineage because it's just a stock android experience with decent permissions management and support for phones I like to buy.
Gettng GPay and bank apps working can be a bit of a To Do, but there's a lot of support over at XDA for that when you run into weirdness. 5 stars, will flash again