Ast2400 chipset can support uefi native display if they flashed the right firmware. See my experiments here.
There are some m2 cards using that chipset but I suspect they dgaf as usual and flash the bios only firmware, since do not mention anywhere the uefi support.
www.ebay.com/itm/226978573244
So you will probably need a hardware flasher and possibly a way to desolder the firmware chip, as I did for my card