What defines an app as a root app, are those the ones asking for root access?
If that’s the case one should use ‘root apps’ as little as possible, right?
I’ll check if Magisk is installed. Don’t think so.
xPrivacy (lua?) is installed. That seems quite useful, don’t know if that made FP2 instable.
XPrivacy is a Xposed module. Magisk is a systemless Xposed, so… one of them is installed in your FP2, for sure. Anyway, you have wifi/mobile data controls per app on LineageOS plus Privacy Guard for other permissions. A bit more rudimentary, but it serves the same purpose as XPrivacy.
If you find those less convenient, then you could re-install Magisk+XPrivacy Lua. Xposed is probably better tested over LineageOS than other random OSes.