Hello,
We don't possess anymore a Piboy XRS on the staff for trying to work for his compatibility for latest version of Recalbox. So we don't support them.
BUT, if you can find at least a 8.0 (until 9.1) Recalbox image for PI4, it could work for your Piboy XRS.
Unfortunately, we don't provide old versions of Recalbox, they are not available on official channels.