I'm also a bit disappointed with Barcelona, they kicked out Aubameyang who already contributed a lot for them. Aubameyang actually have proven that he deserves to stay in Barcelona, he scored some important goals for Barcelona. Sadly, Barcelona prefers to sell him, they ignore Aubameyang's contribution after they signed Lewandowski. Even worse, they also sold Depay, they may try to decrease the players' budget salaries at that moment. However, I think it becomes a problem in the next season if they only have 1 striker for the whole season.
Sure, there are still few weeks until the transfer window is over. Barcelona still has enough time to sign a new striker. But there is no any rumor about the plan for signing a new striker for the next season. They signed Vitor Roque but he is available for the season 24/25.
Actually, Pierre-Emerick Aubameyang have very impressive performance with Barcelona on the first season arriving there, from 17 matches in La Liga he was success scored 11 goals and almost raised 1 goal on every match, but second season after arriving Robert Lewandowski he loss placed as regular position and difficult scoring before return back to Chelsea. But its not really bad after few players departure from Pierre-Emerick Aubameyang until Depay because Barcelona success winning La Liga tittle last season after missing last three season and Robert Lewandowski success as top scorer and stopping Karim Benzema dominance as La Liga top scorer.
Barcelona not required with new striker because they have Robert Lewandowski, Dembele, Ferran Torres and Ansu Fati, seems enough with them for Barcelona attacking line but problem with defender regarding last pre season match conceded 5 goals from Arsenal.