There's a lot going on here that people are mixing together into one Sancho status but it's not that simple.
They may have talked about wages and agreed. If you were to come here, would you sign for X/week. (which Fabrizo Romano keeps reporting)
He may still be watching to see if they qualify for CL. (several United sources have reported)
The teams still would need to agree a fee.
Those 3 points keep simultaneously getting made, and people are conflating them together as this is done once they pay the fee. But they're 3 separate things.