Playdate for puppies in Altstetten area

My puppy is very young and he has a fragile health, but I feel bad keeping him from other dogs. I’m looking for very small dogs (mine is a chihuahua) that don’t play too rough so he can have fun with someone his size. Mochi is very tiny so I’m really looking for puppies his size or a little bigger at most. Thanks ☺️ (picture with water bottle for scale)