I wasn't sure and I was away from a terminal, but I just checked, and yea, I'm on 5.15, but that's with Mint 20.3. I haven't upgraded to Mint 21 yet, as the 19 and 20 series are still supported, and I haven't seen anything in the 21 release...
Kernel 5.19.12 messes up some power sequencing which is burning out laptop LCD panels being run by some Intel iGPU's.
Same with my Mint install.
I did like to play with experimental kernel stuff, but this one is nasty. You wouldn't even be able to tell it's running out of spec before it died.
I remember trying out Ext4 really early, it accidentally some of my files.