I think after getting FA cup, the most important thing for City right now that they are about to win all the three big cups and that doesn't happen all that often, sure City wins the league pretty often, but not FA cup, and the fact that they have both of them this season is a proof that they will try their very best to get UCL as well, and they most certainly will.
The Champions League title is the biggest dream for Manchester City so far and they know very well what to do in the final match this season. Manchester City have secured two titles that should be able to spark the enthusiasm of the players to perform 100% in the Champions League final. Some players didn't have good form in the FA Cup final, so Pep Guardiola will surely instruct something better for the Champions League final.
The probability of Manchester City winning is still very high at this point for the final, but gamblers should be aware of other possibilities such as a draw in 90 minutes. About me, Manchester City is a favorite that deserves full support.