Both mine and my husband's AirPods Pro case are wriggle a little bit. Mine fell down some months ago, but I think the wiggle was there before that. It's no big deal, but it's a little annoying when I noticed it.
I refuse to worry about a tiny wiggle in my fully functional and remarkably reliable miniature sound emission device. But I do have a 20 year old Toyota truck with an intermittent check engine light that I find annoying.