I would like to think Pep could do it, but not even he is a miracle worker, and my strong impression now is that Bellingham’s natural mentality (and the strong influence of the entire entourage and apparatus around him beginning during his brief stint at Dortmund and made more dominate over the past year) is just not conducive to a team-focused role.
For me, he is very much a “it’s all about me” Ronaldo or Ibra type player who is and never will be a team player (at least not until his powers and prestige are waning and he is forced to play that way to extend his career; even then he would probably forgo that and take a fat contract in the MLS), which Pep would never tolerate.