Hi,
I just discovered that someone ported one OPL2 emulator (emu8950 from https://github.com/digital-sound-antiques/emu8950) to the Raspberry Pi micro controller rp2040:
https://github.com/kilograham/rp2040-doom

The process to optimize it to run in real time (along with the rest of the software DOOM) is described here:
https://kilograham.github.io/rp2040-doom/sound.html
I thought that I should share his information, which seems to be a feat of engineering.
Regards,
Lionel