Thank you!
What helped me is this post UEFI boot: no Qubes OS option - #4 by TheEnemy where i had to run efibootmgr -v -c -u -L "TheEnemy" -l /EFI/qubes/grubx64.efi -d /dev/sdc -p 1 where /dev/sdc is the new SSD i wanted Qubes to be installed on, and “TheEnemy” is the name i see in my UEFI settings. I got Qubes to work.