Can you try to remove NVMe drives from your laptop and try to boot Qubes OS installer without them?
I guess you need to find a way to switch storage mode from RAID to AHCI, because your problem looks exactly like the one from github link above.
I might remove the SSDs tomorrow. (I am glad that I have installed everything. I don’t do this often and I’m a bit afraid of damaging something).
Maybe Tuxedo will answer with a BIOS manual. Maybe there is a way to set AHCI. (I have already looked a lot in the BIOS, unfortunately there is no point like in your BIOS).
Maybe I could also try patching the BIOS.
Trying to boot without NVMe could confirm that the problem is with the storage configuration if the Qubes installer will boot successfully.
But it’s not worth it if it’s not easy to remove them and you can damage something because of this.
Better to try and get the answer from Tuxedo.