There’s no good ps4 emulators so I don’t think switch 2 would be that easy

Emulation isn’t an simple as that. N64 used to be a pain to emulate when the hardware was already super dated. Gamcube and Wii however hardly require more ressources than running the software natively. It’s not just a matter of how powerful a system is.

Try emulating a PS3 game with RPCS3 and then its Switch port. Switch is much less demanding.