For sure, there is nothing too hard to see with football and its players, I strongly believe in the ability in this young Mbappe because we have the determination and zeal to playing with full concentration upon every matches he played, i believe it time and destiny permits him, he could achieve what others couldn't with his stay in Real Madrid, PSG has been always thirsty to win the Champions league and that is why you could see the likes of Messi and Neymar played for them but nothing comes out.
There is no point in talking about Mbappe and he has missed his chance this season so Mbappe must focus on the next season, if PSG win the Champions League this year it means luck is not on Mbappe's side yeah it's that simple. As you said in the last few seasons Messi, Neymar and other top players were unable to bring PSG to the final but this season we can see how PSG are doing well without them. If I had to choose, I would actually prefer to see PSG win but on the other hand i know how inter milan reached the final so this is not an easy thing to predict. I wouldn't be surprised if the winner is decided by a penalty shootout and at this stage luck is really needed.