Do your cat's scratch at the door to let you know that they want in from outside? Both of mine do...In and out, in and out, in and out all day long!!!

Neither of my cats will go outside. One ran out the door to chase away a feral cat I was feeding and ran off after her across the neighbors yard. I chased after her and couldn't see in the dark so I ran in and grabbed a flash light. When I went back out I heard terrified meowing. She was sitting in the middle of my neighbors driveway just crying away lost in the big world outside. I picked her up and carried her home. To this day she will go on the porch when I let the dog out. Even stand on the top step while the door is open but she will not go down those stairs.
The other cat will join all of us on the porch but has no interest is going out. A window is good enough for her.