Switch 2 user space has been jailbroken so any game can be dumped. But not the other way, so the Switch 2 can't run pirated Switch 1/2 games yet.

There are now Switch 2 emulators that can run any dumped game on PC/Mac etc. https://emulation.gametechwiki.com/index.php/Nintendo_Switch...

Most Switch 2 games are getting dumped, including the just released Ocarina of Time Remake https://imagepaste.org/i/kx5c925r.png

As I mentioned in my comment there is a native Switch code compiler for Mac, so not emulation https://github.com/seedds/nxnative