I've had the squeaky door problem many times in the past. Sometimes a couple of well placed rubber or felt dots will do the trick. On our last coach I used some cork tape on the loose part of the door and that worked. The trick is to find what's making noise and find something that will keep it from moving underway. Good luck!
2021 Holiday Rambler Armada 44LE
2021 Jeep Wrangler High Altitude toad w/Ready Brute Elite II