In this transfer window Victor Osimene's departure was the only move that happened from outside the expected circle. Everyone was expecting that Victor Osimene would move to a European club (Chelsea, PSG etc). But in fact, he proved all people's expectations wrong and moved to Turkish league and that too on a loan deal.
While Killian Mbappe's departure everyone knew that he would move to Real Madrid. Because recently from few years Killian Mbappe and Real Madrid were linked for a deal. So Killian Mbappe's move was not that surprising, everyone already knew about this move.
Let me also submit this tath Many clubs have signed their targeted players. But in my opinion, the best transfer that has happened in this window is Julian Alvarez. Because J. Alvarez, being the best player, has an expensive value despite Atletico Madrid having signed hum from Manchester City by paying less value than market value.