Two issues, that link thinks the F900's were built in 2018 and 2019, I have already lost confidence in whoever is running that page. The second issue is the bigger one, a diagram is not why you would would buy a service manual. A diagram isn't going to tell you what the process is for a valve adjustment or what the steering head bearing torque is, or anything else service related.
And FWIW, as of this week there is still no word on a service manual/dvd. Deal has no clue what the timeline is, but thanks to Covid it could easily be well into next year.