Comment 3 for bug 1958230

OK, that UUID is pointed in the boot options for the kernel, in grub:

loader/entries/3096152462f947feae105af3ba3df966-5.14.0-43.el9.x86_64.conf:options root=UUID=4a50018c-f6ea-4bd7-95dc-badc49878c01 ro console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=auto

Nothing in /etc/grub* is showing this UUID though - so it's more than probably a lack of update of the "menu".

This is especially true if we run a "grep -r UUID /etc/grub*" from within the image disk:
grub2.cfg: set kernelopts="root=UUID=81161d9c-88cf-4fc4-bf99-691bdcbcd3dc ro console=ttyS0,115200n8 no_timer_check crashkernel=auto "
grub2-efi.cfg: set kernelopts="root=UUID=81161d9c-88cf-4fc4-bf99-691bdcbcd3dc ro console=ttyS0,115200n8 no_timer_check crashkernel=auto "

Here, we can see the actual UUID it should use in the loader:

[virtuser@builder2 ~]$ virt-filesystems -a workload/lab2-oc0-controller-0.qcow2 --all --long --uuid -h
Name Type VFS Label MBR Size Parent UUID
/dev/sda1 filesystem vfat efi-part - 200M - 2180-0667
/dev/sda2 filesystem iso9660 config-2 - 378K - 2022-01-18-10-10-26-00
/dev/sda3 filesystem xfs img-rootfs - 2.6G - 81161d9c-88cf-4fc4-bf99-691bdcbcd3dc
/dev/sda1 partition - - - 200M /dev/sda -
/dev/sda2 partition - - - 1.0M /dev/sda -
/dev/sda3 partition - - - 99G /dev/sda -
/dev/sda device - - - 100G - -