The latest pre-made image of RetroPie is v4.8
Released March 14, 2022.
retropie-buster-4.8-rpi4_400.img
Doesn't work. Can't see anything on screen. Needs Drivers.
https://www.experimentalpi.com/downloads.html
PiBoy_DMG_1.0.7.img has drivers/scripts in it.
The first time you boot the PiBoy with a newly flashed image the PiBoy will reboot itself several times.
This is a normal part of the setup process. Do not turn the PiBoy off during this process.
Is it based on RetroPie 4.8? I think so. Will confirm.