Search for or “Super Mario Maker 3 (fan game)” . These are standalone PC (and sometimes Android) applications created by fans that replicate the level editor perfectly. They include:
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
There are three main reasons for the popularity of this impossible search term: Search for or “Super Mario Maker 3 (fan game)”