Apologies, now i understand, thanks for you patience.
I can see the error now:
# dd if=/dev/nvme0n1 of=/dev/null bs=32k
dd: error reading '/dev/nvme0n1': Input/output error
133+1 records in
133+1 records out
4370432 bytes (4.4 MB, 4.2 MiB) copied, 0.460827 s, 9.5 MB/s
I managed to move the VMs...