Since we do not add any Intel drivers this regression may come from upstream.
You could test nightly build which have kernel 7.0.
Also total random guess: Perhaps more recent kernels expect more recent firmware blobs, perhaps the ones on the board are outdated (or are expected to be on a different place)? No clue though through which package those are shipped though.
Seems like the files have been touched last around 7 month ago: https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/linux-firmware.git/tree/intel/iwlwifi