I thought that too. Hopefully it’s a temporary arrangement.

Pretty standard for a kitten up for adoption AFAIK. Enough space to go around in, not quite enough that they can accidentally hurt themselves (kittens can be very clumsy). Still better to have a room to “interview” a kitten or cat IMO

Oh, I thought it connected to a cat flap to allow the cat to experience outside

Possible it’s the beginning of introducing it to the other household pets.