Just to add to this, I’ve since installed a Pi 3 B+ and used bog standard RetroPie and all is working.
I was using an Arcade Punks image before on the RPi 4 and couldn’t download the picadehat drivers.
The same thing on the RPi3, the Picadehat drivers won’t install using an Arcade Punks image, anyone managed this?
Shame as they worked on my original Picade.