Open the Nintendo Switch Emulator named YUZU on your PC and locate the ROM file from inside the emulator.Also, download the Kirby and The Forgotten Land ROM file and extract the zip file to run in the emulator.So first download the Switch emulator from the above direct link.
You need a Nintendo Switch emulator for Windows to run this ROM.Download Nintendo Switch Emulator How To Play Kirby And The Forgotten Land ROM On Windows PC