

I believe 6.14 is somewhat recent, so it might be just a matter of when each installation file was obtained.
Yeah. If you upgraded to Mint 22.2 from 22.1, you will still be on kernel 6.8. But I believe if you installed via a full install directly to 22.2, you will be on kernel 6.14.
I recommend upgrading your 6.8 installation with a fresh download from your preferred source and a full reinstall.
You can upgrade the Mint kernel to 6.14 via Software Update Manager > View > Linux Kernels. No full reinstall required.
Though, OP, unless there is a specific reason to change it or you just like doing so, I would leave it alone: don’t fix things that aren’t broken.
I did it on one of my computers as I wanted a feature that was in 6.14. It didn’t cause any issues, nor should it. I believe the disto maintainer is simply being cautious and not having people auto-upgrade kernels as part of minor version upgrades.