My wife once brought home a cat from "Feral Friends."
It got down in the crawl space and was impossible to get out. We finally (after several days) caught it in a racoon trap.
That cat lived under our bed for over a year. It would eat at night. The only way we could pet it was by hanging an arm off the side of the bed and it would come to us.
Fast forward a couple of years... it was the sweetest, kindest cat I've ever been around. It would sit in our laps for hours and let us pet it.
Cats can take a loooooong time to acclimate to a new home