While most handhelds use Rockchip processors (supported by forks like ArkOS or AmberELEC), a specific subset is officially supported by EmuELEC: EmuELEC | Emulation Saviour for Amlogic SoC Devices 17 Mar 2020 —
EmuELEC does not support Rockchip devices (like the RK3328 or RK3399 found on some Odroids and Firefly boards) or Allwinner chips (found on most Orange Pi boards). If you buy an Orange Pi 5 hoping to run EmuELEC, you will be disappointed. You need Batocera or JELOS for those. emuelec supported platforms