If this is still needed, I managed to build patchmanager3 on OBS (as a learn project, I don’t know how to use CODeRUS’ docker images yet) and there are some rpm repos there.
The branch I built contains two fixes I toyed with, one to make it build on aarch64 and another one to work with busybox.
If you want to test these, enable ssh developer first and check that you can connect to your device in case liptstick doesn’t start. Then, from the same ssh connection
# zypper ar http://repo.merproject.org/obs/home:/b100dian:/patchmanager/sailfish_latest_aarch64/ patchmanager-obs
# zypper ref
# zypper up
(Follow the instructions from zypper if you get unsigned, existing installation etc errors)
(The url for arm32 ends in sailfish_latest_armv7hl)