You are saying a good thing that they have Reece James now. However I especially pointed that out because there is a possibility for César Azpilicueta could leave the team this summer.
I heard César Azpilicueta is interested in Barcelona. After Dani Alves retired it seemed that Barca did not have much money to buy new players at a younger age. But until now I have not heard any official news. At this age he can still make regular appearances in the EPL maybe for another two or three years. Chelsea may be able to buy other players like Jules Kounde, De Light, Niklas Sule, or Maxence Lacroix. They are young and have a longer playing term. They have abundant funds of course it doesn't matter if they want to buy new players.
After all Azpilicueta is still under contract with Chelsea for at least one more season, and if no team is interested in signing Azpilicueta in the summer transfer window then maybe Barcelona can postpone it. Barcelona can get him for the 2023/2024 season, because in June 2023 Azpilicueta will be a free transfer if Chelsea do not renew his contract. Azpilicueta himself is currently 32 years old and of course Azpilicueta will no longer be playing in the EPL, joining Barcelona or a Serie A team might be the right choice if Azpilicueta chooses to continue playing.