Works beautifully in x2 mode, but getting nothing with x3 and x4.
Panasonic Fz802 (4k OLED)
PAL 50Hz (SNES, Megadrive, Amiga etc)
x3 and x4 for PAL would mean 1728i and 1152p, which aren’t typical resolutions, even in the PC realm; I would expect support for them to be unrealistic. You’ll probably have to stick to 576p and scale up, or hope you can find a secondary video processor that can understand them.