What is seen publicly, it is true that Mbappe made CR7 one of the factors that made him join Real Madrid. I do not deny his commitment in many ways, starting from his efforts to learn Spanish to his sentences and style when he was introduced in front of the Santiago Bernabeu public.
At PSG, everything can be obtained including an extraordinary salary. But there are other targets that are desired in his career as a professional footballer. If many people say that Mbappe will be the new generation when Ronaldo stops, I agree with that.
He grew up idolizing Cristiano Ronaldo for sure, he had his posters all over his childhood room so there is absolutely a connection there. Of course it is not a shock that Real Madrid also gets the best players, they have like 15 UCL's, and many of them were won in the last years too, they won 3 in a row, then another one after that, and then last year as well, 5 UCL's came within the last 10 years, they have 50%+ rate so far.
This makes players want to play for Real Madrid as well, Mbappe won everything domestically and sure if he went to Barcelona there would be a chance he could win la liga too, which means that there is really one reason to join a team like Real, which is to win UCL. I agree Ronaldo played a big part, but I think UCL also played a big part.