I’m now thinking outside the box here.
Is it perhaps possible to revert the changes?
When I was upgrading and said yes when asked if I wanted Qubes to backup Dom0.
From reading I understand that it would have taken a snapshot of Dom0, but I can’t find where it is saved and Claude doesn’t know either.
According to this post: Automated backup during 4.2 upgrade, should I clean it up? - #2 by DVM the snapshot is not deleted until stage 5. Since I only got as far as stage 3, it in theory should still be on my system.