There must be a lot of prep, note taking, background work and zoom calls behind the scenes
That's why they have so many staff. They do that I would think. I doubt William is toiling away at a computer googling stuff.
No doubt their Staff prepare the brief, but the Royal who is doing the visit must read it, question it, understand a fair bit about the organisation to be visited.
No one expects the C.E.O. of a large company to do all his own research