Fold 7 is thin but...

Yeah, the wobble is definitely going to be more noticeable this year, especially with how thin the Fold 7 is getting. I’m with the folks saying a horizontal bar would’ve solved half of this thread’s complaints. Until Samsung changes the camera layout, a slightly thicker case with a raised ring around the lenses is probably the best fix.
 
I just slap this on and no more wobble.

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Which brand/product is that? I have a Spigen external magnetic ring only because stupid Latercase refuses to integrate them into their carbon fiber cases.

The ring isn't very thick, so I don't think it does anything for the wobble, but it does help my car wireless charging pad to hold the phone in place. I'm thinking what you're using could really lock it in place while driving.