I believe a deal can be found soon. We all know Juventus wants him, but Manchester United's asking price is far higher than Juventus can afford. Therefore, I believe the transfer can be finalized once we reach a financial agreement. The player will also have a role to play in this, as he must convince his team to sign him. If the transfer to Juventus is completed, a much better career could await Sancho there.
There are many possibilities for Sancho's future career with Juventus, but I believe it would be better than a move to Manchester United, especially given his young age and impressive individual qualities.
The reason Juventus is delaying the Sancho transfer, I believe, will be further negotiations to secure a lower price. Manchester United and Sancho are no longer in a relationship, so Sancho will still be sold regardless.