Barcelona decision to sell Aubameyang and then replace it with Lewandowski was very correct, Lewandowski was able to answer Xavi trust in him by helping Barcelona win the La Liga title race as well as the Super Cup. Lewandowski was also the top scorer last season which made Benzema fail to win the top scorer title twice in a row.
Xavi can still rely on Ansu Fati as a substitute for Lewandowski if there are problems with his health. Raphinha is starting to blend into Barcelona style of play, he can be relied on on the right wing. Lewandowski certainly cannot always be played in every match, especially since Barcelona match schedule this season is very tight, Xavi needs to rotate in several matches in order to maintain the fitness of his players while preventing injury to his flagship player.
We don't doubt xavi performance in building Barcelona because he has proven to be a successful coach after bringing Barcelona to win Laliga. If we go see every decision of Xavi, it is certain that he acted well even when he sold Aubameyang to Chelsea, which at that time Aubameyang was able to appear neatly but that decision was the right one which is conducted Xavi. Lewandowski has indeed become a core player in the depth of the Barcelona squad because he was able to make a big contribution in his first season with Barcelona.
We also want to see Barcelona being able to provide strong competition in the champions league next season, because since being left by Pep Guadiola, Barcelona has looked weak in the Champions league. Therefore we would like to see how xavi performs in the champions league in the next season with barcelona.