That's my doubt, too. But interestingly, this commit has
Fixes: 8f892e225f41 ("wifi: iwlwifi: mvm: support iwl_dev_tx_power_cmd_v8")
but this commit hasn't been backported in 6.9.5. This commit is backported to
6.9.6 together with the fix above.
In anyway, those commits should have been already included in 6.10-rc3, so the
kernel in OBS Kernel:HEAD kernel should work. Can anyone check it?