On this page of the guide to The Witcher Monster Slayer, you will find information about whether applications like Fake GPS work with the game.
Apps such as Fake GPS work with The Witcher Monster Slayer. You can change your character's location without even leaving your home. This way, it's easy to find legendary monsters or do quests without taking a single step. This is a solution that works well if you don't have the opportunity to leave your home or if the weather is not good.
Playing at home
You can play from home without any app. Some monsters will appear very close to you. It works the same way as if you were outside. Monsters appear at different levels, and of different types. Also, they are dependent on the weather. Simply put, the game does not read that you are sitting at home, but examines the area around your home.