>>713200610No, the Switch 2 is using emulation for backwards compatibility rather than native hardware, and it's not 100% across all games, much like how there are compatibility issues with practically every backwards compatibility-oriented emulator. Pikmin 3 got an update a few days ago that addressed the playback issues on the Switch 2.
You're probably too young to know this, but this is what happens whenever new hardware is made. There were even original Game Boy games that had issues on a Game Boy Color due to minute differences in how the hardware worked, especially if the game relied on hardware exploits that wouldn't be possible on later iterations.
https://gbdev.gg8.se/wiki/articles/Older_games_with_compatibility_issues_with_newer_Game_Boy_models
There were GBA games that had issues when running on a DS or DS Lite, like Mega Man Battle Network 4 Blue Moon. Not every PS1 and PS2 game ran flawlessly on the PS3 either. And this isn't even accounting for games with bad programming that don't even run correctly on their intended hardware, or games programmed by people who misunderstood the hardware and completely botch the soundtrack.
https://tcrf.net/Disney%27s_Donald_Duck:_Goin%27_Quackers_(Nintendo_64)#Soundtrack_Errors_And_Oddities