Qwiss -- yeah, I'm not really sure, nor do I suppose I care that much.
I suppose you could play Mbuemo at CF, Fernandes as a left attacking mid, and and Cunha as a right attacking mid. That at least gets Fernandes back to his preferred left channel.

What I know is that Man United is starved of talent. In regards to attacking, Fernandes, Dalot, and Mbuemo are about the only players worth a damn. So you better be building around them, and not Hojlund, Garnacho or Cunha (who has game, but may stiffle Fernandes).
Are Man United really going to sell Bruno Fernandes and replace him with Cunha?
Are you going to trust Mbuemo to transition to CF? or rely on one of Hojlund/Zirkzee to be a CF, Mbuemo RWF and Fernandes LAM?