Yes, RV roofs need maintenance!
I suspect most RV owners don’t realize they need to do maintenance on their roofs. With our two tent trailers, which had aluminum roofs, it was fairly easy. Just wash with soap and water, rinse, and check for any problems where the center seam was covered with a metal trim piece.
Our Milan, like most newer RV’s, is different. It has a thin membrane that requires more attention and maintenance.