Made a little progress on this.
First of all, it was possible to install R-Image on Parallels on a MacBook Pro, running MacOS Ventura.
Then I fuddled around w/ mounting the rdr image and trying to inspect the APFS image using Paragon, then MacDrive, w/o success!
Later, I reformatted the destination drive to FAT. Still not visible in R-Image Restore as a destination disk.
More forth and back, changed sharing options on the drives etc.
After a while the Restore feature allowed me to select the empty USB drive as destination disk.
Estimated time left... 1 day 15 hours

))
Let's see if the drive is readable, after all this work and wait ... hopefully ...
Made a little progress on this.
First of all, it was possible to install R-Image on Parallels on a MacBook Pro, running MacOS Ventura.
Then I fuddled around w/ mounting the rdr image and trying to inspect the APFS image using Paragon, then MacDrive, w/o success!
Later, I reformatted the destination drive to FAT. Still not visible in R-Image Restore as a destination disk.
More forth and back, changed sharing options on the drives etc.
After a while the Restore feature allowed me to select the empty USB drive as destination disk.
Estimated time left... 1 day 15 hours :)))
Let's see if the drive is readable, after all this work and wait ... hopefully ...