The Switch 2 has approximately 10% of the processing power of the current generation of consoles. I don't think it's realistic to ask for a Switch 2 port of Planet Coaster games as accommodating Nintendo would mean major compromises in the game.
Some people have said they can get Planet Coaster games running on Switch-like PC gaming handhelds. There's also a small chance that Parkitect gets ported to Switch 2 if enough people make noise about it.