I recently (yesterday) got my official /e/ FP3+ and really like it so far.
But I did have some trouble with installing my online banking app from UniCredit when setting up the PIN code. In the end all I needed was to try a few times, and then it worked, but before I fixed it, this led me to search the forums …and resulted in a question I now have:
Why does a banking app need root access?
From the topic linked below it seems (some) banking apps require a rooted phone to work. Luckily in my case, the app seems to work, but it did complain on /e/ about root access. Oddly enough on my previous LineageOS phone the same app complained that the phone’s bootloader is unlocked.