I have Batocera 5.25 with no missing bios on LCD screen ( 1920x1080 60.00*+ 50.00 59.94)
When I tried FS-UAE (i tried A1000, A500, A600), only adf and zip of adf worked very good and the screen was big. With the rest, i didn't get anything.
With Libretro-PUAE, adf, zip(adf), lha. worked but the screen is little in comparison with FS-PUAE. Only one game in NTSC was more and less in correct resolution. But I have some whdload in zip file (with save into it) who didn't work and same for Libretro-.
I remenber it's worked good with on RP3+ (Batocera and recalBox) with amiberry (but not the same hardware so no the same emulator).
I just tried recalbox Recalbox 6.1.1 (with the right bios) with Libretro-PUAE : nothing works !
So i don't know what's happen with Amiga ...