I agreed about this as Federico Valverde is here for long time as this is his boyhood love club, and he will never think to leave right now, but officially we have second big from the Liverpool which is having worth of £77m with most chances this is also going to be rejected but good thing they are trying this which is also worth to try for the player like Federico Valverde.
Valverde was grown up by Real Madrid and he is one of their best young midfielders. Casemiro was sold, Modric is too old and likely will have last one to two seasons with Real Madrid, Kroos is already old enough and Valverde is one of best midfielders for Real Madrid future. He loves the club, play well and Real Madrid will send him to another club. Except if Real Madrid buy a very expensive midfielder and Valverde loses his position in the squad then will feel unhappy, a transfer might occur.
So far, no signal for such things in Real Madrid and he will stay in the club. Real Madrid will not sell him just to buy Mbappe in my opinion.
the reason Valverde will stay is that Madrid have yet to get a replacement in his position. so there is no reason for Valverde to leave Madrid. even though there were big offers from Arab clubs, even from Liverpool who also wanted to sign him.
we don't know how ambitious Madrid will be to sign Mbappe, if it actually happens. Maybe Valverde will indeed be released to Liverpool. some rumors of the talk are already in the media. so we're just waiting for the truth.
Federico Valverde is a central midfielder so I don't see any reason to take Mbappe over him because Mbappe and his playing positions are different. Real Madrid is already interested in taking Mbappe, so Real Madrid may not give up any other player in the team to take Mbappe. Federico Valverde is a very important player in the team and he is a regular player in the Real Madrid XI and leaving the way he plays in the midfield will leave a gap in the Real Madrid midfield as Casemiro has already left for Manchester United. So if Real Madrid leaves another midfield star at the moment, they will not be able to perform well on the field. I think Federico Valverde will stay at Real Madrid.