Trainer difficulty should be called "Trainer Realism". I've been posting that in forums forever and remain unchanged on that.
The rest of the information (minus the elevation, which is dumb that it's not included the way
msu2001la states - Zwift has forever claimed that it's done this way for people who free are free riding because that's the only way it can be done for them since I've first seen people asking about it 3-4 years ago) is available in the highly customizable Sauce for Zwift overlay. It is annoying that you have to pay $2 a month to get an outside app to do all of the things that Zwift should be able to do inside the app, but it is what it is.