While PPSSPP won't work, there are dedicated Switch emulators that can run the game: Ryujinx (PC): Widely used for playing Super Mario Maker 2 on PC
While the official game doesn't exist for PSP, the community has created fan mods and "rom hacks" that offer similar experiences: How to play Super Mario Maker 2 on PC (Yuzu Emulator) super mario maker 2 ppsspp download
Let’s cut straight to the chase: