I don't see the possibility of mbappe going to Manchester United. Ronaldo being his childhood Idol does not mean he could easily go to Manchester United.
Mbappe is a young player and he is very much interested about the money which Manchester United might not afford to give because they already have a big player like Ronaldo who they are paying large. however if Manchester United manages to qualify for Champions League next year there is a very big possibility that any big player would want to come to Manchester United
Mbappe going to Manchester United is not an option!!!! It seems impossible already. What will Mbappe be looking for at Manchester United if I may ask. Ronaldo might be his childhood idol but that doesn't mean he will be willing to risk losing spotlight and his fame to play for Manchester United after all even his idol Ronaldo is not happy playing for Manchester United and I'm sure he already regrets making that move and the fact that they are competing in the Europa league makes it even worse so Mbappe to United makes no sense at all.