Hasn't he been tossed out because of the transfer interest in him? He was ahead of Nkunku and even Sancho, Neto last season.
And there's interest in him because he's been good (not spectacular) and has given glimpses that he can be of great use in a game - constantly takes on defenders, always looking to progress the ball. I can see BlueCo taking a 50m + deal but I don't see how replacing Madueke (who is 23, used to the Premier League and has consistently got better in the last two seasons) with a teenager like Estevao is making the squad better?
If we are looking to replace Madueke, a good player will cost more than 50m.