Get yourself over to YouTube. There are at least two channels that feature RV roofing issues.
The AZ EXPERT channel just completed a 4 or 5 part major replacement of a Minie Winnie roof that required a total rebuild. He does a lot of roof inspections and such as well.
There is also an RV roof repair channel called RV Roof Install. I don’t find him as interesting but you will see a lot of content on fixing RV roofs.
Good luck and keep us informed about your progress.