I think Real Madrid should make a move on him pretty quickly. Because I don't think there is any point to keep waiting for Mbappé, which eventually might not even happen. I am pretty sure that if an English Premier League club gives him more money than Real Madrid, he is going to go to that English Premier League club. So Real Madrid should be smart and not make history repeat itself. it is very much possible that what I said will exactly happen and Mbappé will also probably again get more money in the name of Real Madrid from other clubs. And of course, Osimhen will be great for Real Madrid.
It depends I believe. If I understand correctly, Real Madrid is one of his dream clubs and he always envisioned to play for them. In terms of finances, I think there are only a few clubs that have deep pockets such that they can make a bid for Mbappe. Maybe Liverpool has a chance when they sell Salah for a lot of money, but then there is perhaps Manchester City. I am not sure if any other club would be attractive enough for Mbappe to go there apart from the money. Arsenal London is a good club of course, but it isn't quite as attractive as Real Madrid or Manchester City.
But I'm not sure which alternative players Madrid will recruit and regarding alternative players, I often read that Haaland or Osimhen could be Real Madrid's alternatives.
Even though Liverpool can get Mbappe later, Real Madrid will not be disappointed because they can still get an equivalent striker.
I don't exactly know how many games Osimhem now played after his injury, I think it was three or four, but he is miles away from being a transfer target for Real Madrid I think. When he was having that great form and was a goal guarantee, things were looking differently and many of the top clubs were thinking about signing him. But for now I believe most of the clubs also put a potential transfer on hold in their minds. Or someone will go for him and try to keep the transfer fee as low as possible as he is not performing very well. That could be an option as well, but without any goals he isn't that valuable. He might still need some time, so it is more like another half a year to polish his application again.