Every new version I try and everytime I get a kernel panic and have to revert. Looks like I'm stuck on 6.2.4 which sucks because I'm sure there are some bugs that would be nice to get fixed. Anything I can do about this, seems kind of shitty to have paid for a license and now the hardware isn't supported.

Without a comprehensive list of installed hardware, and diagnostics / screenshots of the panic, not much anyone can do to help  

What Squid said. Without diagnostics from an upgraded version of unRaid no one can help you to help yourself.

 

Things to try that have resolved similar issues for others:

1) run MakeBootable with the newer version

2) run checkdisk on your unraid boot thumbdrive from a WinOS system

3) try running newer version on a different bootable thumbdrive

What's the best way to get this info? Since it panics I can't login via ssh to copy logs, is there a way I can get them from the stick if plugged into another computer?

Unfortunately no.  Panics would only be displayed on the local attached monitor and not logged.  Pic's and/or a video might help.

 

But, what @BRiT said in his post, and what I said in mine is still valid.