André ter Stegen was stable in Barcelona and he had a good performance in this team other than the game against Monaco and finding another goalkeeper at this time cannot be easy for Barcelona at all because most of the goalkeepers are hired by other teams.
Now it seems Barcelona started searching for new goalkeepers and Szczęsny is linked to this team.
Szczęsny didn't play for any team after Juventus to have more time for his family.
In the evening I already read that Szczesny wants to resume his career and he will join Barcelona as a free agent, in the next few days he will undergo a medical examination and start training with the team. It seems that Peña is not ready to fully replace Ter Stegen and Barcelona found the easiest and most accessible way to replace the goalkeeper. But since Szczesny ended his career, perhaps he is not so good now, since he was on vacation for a long time, but since he recently played for Juventus, I think it will not be difficult for him to return to the game.