I think, Barcelona is planning to bring in some potential players in this summer, but I don't know if they have the money to sign kylian Mbappe and Victor Osimhen because those two players have potential skills to improve any team that will embrace them in this summer. Now that many teams are seriously working to ensure they sign in talented players that will help them to improve not to end up in second position or third position in the la Liga league competition than to work hard to ensure things work for their favour by winning the la Liga league title next season. Real Madrid is still focusing on PSG striker but the money the team is demanding from Real Madrid to pay for the player is making Real Madrid to quit, because they don't have such money to sign only one player in this summer.
I don't think Mbappe will ever be on Barcelona's radar. Currently, the Blaugrana almost have a mature squad with unstable financial conditions. I think the arrival of Gundogan is enough to complete the Barca squad to return to control of La Liga. Osimhen could be the right option if Xavi wants to add strength to his attack line, but the price is too high, of course the team from Catalan cannot afford it.