It would be better if you provided details on this site, rather than link to elsewhere, especially if you want to give attention to an issue.
The report_inxi_Fza.txt on the Ubuntu MATE discourse shows a 6.17 kernel for starters, yet a quick look at the current manifest for the daily shows
linux-image-6.18.0-8-generic 6.18.0-8.8
linux-image-generic 6.18.0-8.8
but you do mention an older ISO??
Why not try a current ISO? eg. when I went to compare the kernel details of your pasted details with what I expected, I looked at the 20251228 ISO
I suggest you re-test using a current rather than daily from over a month ago.
Later addition: I used the daily as you mentioned the daily build in your initial text. If you were limiting yourself to officially released snaphots your ISO is still old, as Snapshot 2 for Ubuntu MATE resolute can be found at Ubuntu MATE 26.04 LTS (Resolute Raccoon) having an ISO of 20251209 which is older than the daily I used earlier, but it’s still much newer than your old ISO (but monthly snapshots are older than dailies)