Though, where there's a will there's a way...

https://doom.fandom.com/wiki/16-bit

>After the release of Doom II on the PC, the original three episodes were released to some 16-bit consoles that used special 32-bit enhancement hardware. For the Sega Genesis, the 32X allowed for additional address space to enable Doom to run its demanding resources of the time which a 16-bit system wouldn't have handled. Whereas with the SNES, the Super FX 2 chip inside the DOOM cartridge allowed for an internal co-processor of the game cartridge to eliminate the need for bulky addons for the aging SNES.

Would it count if you somehow built in a 32-bit coprocessor for your 15-bit apollo doom port?