Hi!
This is common yes. Here is mentioned a fix: https://www.reddit.com/r/consolerepair/comments/3ltzme/new_3ds_xl_hinge_very_wobbly_any_way_to_tighten/
Here are some guides: https://gbatemp.net/threads/permanently-wobbling-fix-on-n3dsxl.621255/
It’s not easy to get this working again.. but following this guides should help you!
Good luck with the repair and let us know how it goes!