The Fujifilm Camera Fundamentals course is designed to help you understand photography with Fujifilm systems. The current iteration of the course was updated with the X-Trans 5 generation of cameras in mind (X-T5, X-H2, GFX50S II, etc).
With that said, the content can be applied to any Fujifilm camera in the X-T2 generation or later (X-T2, X-Pro2, X100F, X-E3, etc) the way the menus are presented in the course. Fujifilm did a massive overhaul to their menus in this generation. Earlier cameras have entirely different menus, though the features discussed in this course can still be applied if the camera has that feature.
Fujifilm is always adding new features to cameras. This course covers what's presently available. Older cameras won't have all of these features, but what your older camera does have will be discussed in the course.