Comment 2 for bug 1919186

IIRC the discussions that happened on this topic already asked for the target file system.
I see you mount the image there
  root@ziomario-Z390-AORUS-PRO:/media/ziomario/isoarm/aosp# sudo mount system-rw.img system-rw

ut fromt he log it is unclear what Filesystem that is, and the rsync command asks it to retain ownership/permissions which some filesystems can't store.

Hence after mounting your image, could you check as what this is effectively mounted?
Maybe for a start just post:
 $ mount | grep system

Once you know that you very likely will be able to break it down to a much simpler case.
For example take "one file" with "this set of ownership/permissions" and copy it from "e.g. ext4" to an image that is "unknown filesystem".
Which would be much much easier than having everyone try to setup aosp and such.