The console doesn’t officially support ROMs. It must run games off the original hardware carts.
However, there’s a fairly simple hack to get ROMs to play on the SD card slot of the Analogue Pocket that many suspect was unofficially developed by Analogue themselves.
Yes, but you still need to install the cores developed by the community in order to play ROMs.
The necessary core for ROMs was released barely a day after OpenFPGA support was, but it wasn’t released by Analogue.