Sorry I am only bases this off of what I find searching online. I am not an Apple tech nor do I rep Apple in any way(besides this)
I have read that there is a gap tolerance allowed - this measurement stated is only between the titanium frame and glass panels.
According to the Apple Genius they allow the gap as long as it does not compromise the gasket that the glass panel sets on (in between the frame and glass panels).
For me.. this does not work. I have since moved on from iPhone/Apple.
For reference my gf has the iPhone 15 Pro max. She is hard on her phones so after cleaning it up and inspecting I noticed the gaps and evenness of the panels are "perfect".
We are dropping $1,000+ on these phones. I'd prefer not to play iPhone roulette here.
Best of luck to anyone having these issues - again... I'd strongly recommend getting Apple Care and having the Apple Geniuses note any issues/flaws you have with your device.
Happy Easter! Enjoy your weekend - stay safe!