I hope both cats have been neutered and spayed. Please have them done, if they are not, so they don't breed. Cats can live in small spaces, they don't need to go outside. What they need is attention from their humans and elevated space such as a cat tree or shelves on the walls.
Cats, especially kittens, need interactive play time from you every day, several times a day. All cats need this.
Cats should not be out at night because they are at a higher risk from predators. Racoons, fox, coyote, roaming dogs, or other predator animals can and do kill cats. Also, cats are less visible on the road.
Ragdolls are by nature quiet and low activity. You should have researched the breed before buying. In addition reputable breeders require a contract that you spay, and keep the cat inside. Did you not sign something like that.
Please make more effort to entertain your kittens inside before letting them out, where there is a very high risk of them being killed, seriously hurt, or stolen.