So it makes sense that one of the most epic scenes in Denis Villeneuve's "Dune: Part Two" features Paul Atreides (Timothy Chalamet) going through the Fremen rite of passage and catching a ride on ...
The movie contains other scenes of Fremen riding sandworms, but while we see how people can get on, the film never shows someone getting down. That question is answered in the later Dune book ...