But that stuff you don't expect to see in the show. It's something you might read about afterwards. And most of the stuff in the Star Trek Encyclopaedia is original content created after the show was cancelled. Very little of it appeared in the show, and they didn't use a show "bible" like later series did.
I suppose they could add multimedia pop up contents, so if you, for example, wanted to know the make and model of Sol's ship, you could pause and look up the tech specs, but that would require some upgrading of the Disney+ app.