I wanna say just slip your tiniest flathead screwdriver in there and pop it back out, but FSD relies heavily on that camera being exactly where it’s supposed to be. Maybe just swing by a SC and ask them to take a quick look. If you schedule service it could take a while depending on your area.
It looks like the mounting bracket should be permanently attached to the rest of the fender flare.
Might need some adhesive/ hot wire repair, or a new one