screenshot please. I should say I have no idea why this happened. I’m just trying to see what state your iPad is in to offer advice how to get back to where you were if possible.
You edit what shows on home page in ay given app by pinning or unpinning enabled sources in the side bar. Open side bar click edit and then click the push pin icon so it turns grey to unpin something from home screen the hit Done. You can view or re-pin it by going under MORE and doing the same. (if you disable completely then it won’t be avail at all in any app)
in this image i have unpinned Discover so when I hit done it will be gone from home screen.
Was the Plex Home sidebar set to default during the password reset + sign out of all devices?
I fixed so many players I can’t remember what my iPad did, thanks.