For now Batocera checks the whole BIOS set for all possible systems, but it’s a bit annoying and confusing for those who running OS on boards that have just limited set of supported systems (f.e. Batocera always reports on RPi3 about missing PS3’s PS3UPDAT.PUP that used only on X64 PCs).
I suggest change default behavior to check only board-supported system set (which are installed into), or even check only systems that has user’s ROMs inside.