Hard to find answers to Zwift Integration Questions

Hi!

Here are two questions I had about the Zwift Integration that I couldn't find elsewhere.

What happens if I can't complete a ride? What's the protocol for that? Is it different if I can't complete it because my time ran out unexpectedly or if I just flat out fail it? Any idea how to handle those scenarios? Also, if I fail a ride because it's too hard or because I'm getting sick or because I'm famished, how does that work now?

Secondly, I know the AI is working on rides that are sent back and you may get adaptations. Are those now automatically accepted? What if I don't want to change my ride to an easier one, for example?