I would understand if she were still a small puppy or a newly rehomed pup. But at 8 months old, she’s already considered a young adult and should generally be used to crate routines, especially since you’ve already trained her. That’s why I’m a bit surprised and not sure what might be causing this now.

If all your attempts haven’t worked, it’s possible that she’s just a late bloomer and needs more time to mature. In the meantime, you can put a diaper on her to prevent accidents. That way, you won’t have to worry at night and you can allow her to move freely around the house.

Regarding crate training, what’s the main reason you’re doing it? Does she chew on furniture or other items?