Rescued/adopted a dog that was rehomed

I’m on mobile so I hope the format is okay. I wanted to post to get some advice/insight from other people who have experience with dogs who were suddenly rehomed and are in the adjustment period.

I don’t want to give too many details on the situation. But I rescued a dog that was being rehomed/going to be sent back (I was approved to adopt them by a separate party who had the dog’s best interest at heart). They came from a home with lots of limitations, I have little to none aside from kenneling when I leave the home, which the old family also practiced. They get along great with the dog that was already part of my family, I’ve had the new pup (1 year old) for 2 1/2 weeks now, and they are starting to get restless and destructive. I’m okay with the destructive, I can redirect them with toys, puzzles, and play, but I’m more worried with the restlessness.

Google can only do so much, but does anyone have any tips on anything else that can help enrich the rehomed pup so that they are feeling more comfortable and safe in the new home? I’ve been trying to create as much of a schedule as I can, but it’s 1 am and they’re still restless and destroying toys and I’m not sure if this is normal or how to help them. And if there’s any advice anyone has overall during the rehoming process I’d greatly appreciate that. Thank you in advance.