Nope haven't seen exhaust clamps on anything OE for 20+ years unless you count the headpipe which is just a ball clamp. No adjustment there. This has been an "issue" since MY21. It's not as noticeable on the trucks because of the exhaust bezel. My guess is the tubing expands/contracts with a lot of variance due to stressed from bending and heat from welding.I’ve also noticed this on many new tahoes, Yukons, and Escalades. Crazy that they’re crooked.
I also have noticed several trucks with their emblems also not straight…..
If it was me I’d go under there myself and adjust them. OEM exhaust should just have clamps you can loosen and adjust the pipes.