Both are not directly formatted but are RAID members. You first need to assemble the RAID:
mdadm --assemble /dev/md1 --run /dev/mapper/loop0p1
mdadm --assemble /dev/md2 --run /dev/mapper/loop0p2
Now, /dev/md1 should already be working, but is only /boot of your old server, so, nothing really important. /dev/md2 is where your data is stored. But, still, you won't directly find a filesystem on it, there's another layer: LVM.
# Discover the volume group
vgscan
# Enable all the logical volumes on this volume group
vgchange -ay main
and now, you should have /dev/main/root available that you can mount where you want to copy the data