My last cat had learned to turn a door knob to let himself out at about a year old.
Friends who saw it would be shocked and say what a smart cat he was, I’d reply that if he was so smart then why doesn’t he close the door after himself /-).
Half Siamese and I wondered half bobcat,,, he was huge,,, never meowed, just a sort of growl, was so fierce he would sit up in the hedge and ambush stray dogs from above. Couple months of that , wasn’t a stray dog that would come near my place. He also like to ride on my 454ltd motorcycle tank .