Cats may step on your face because they are playing or to show that they care about you. During play, cats may gently scratch your face or body with their claws. This is their way of signaling play.
At the same time, cats may also use their paws to gently scratch your face to show their concern, just like humans It's like touching someone else's head with your hand. If you don't like your cat stepping on your face, you can try offering them other play options, such as play toys or a hunting simulation game. At the same time, you can also tell your cat "no" when they step on your face or gently press their toes with your hand to signal them not to do so.
