I thought Juventus dropped out of the race to sign Sancho because of the player they signed, and they didn't have enough money to pay for Sancho's transfer fee at the moment. I have been following transfer news for a few days now, and I haven't heard that Manchester United and Juventus have agreed on a transfer fee for Sancho. How sure are you with this information?
After Juventus bought Francisco Conceicao from Porto, they decided to pause the negotiations on the transfer of Sancho, at least for now. I think that after weighing everything, they understand that Sancho is not the player who can significantly strengthen them, and I think this is the right decision. By the way, Amorim does not consider Sancho as a Manchester United player at all? By the way, Douglas Luiz did not show up for the first training session after the holidays and did not even come to the base, the reasons are still unknown.
Of course, that's the best thing to do. You don't buy a player that wouldn't add much impact to improve the club performance when you are spending wisely. If Juventus does not have extra funds or sell any of their winger Sancho will look for somewhere else to go to. Otherwise, he will just be wasting his time in Old Trafford. Amorim has no interest in Sancho.