The player of the month award has a lot to do with the role that you play like almost every other award. Attacking players are more likely to win them because there is an emphasis put on raw statistics such as goals and assists. The only none scoring/assisting player that has won it in the last 4 years is Van Dijk.Of course he was our best midfielder as he had no comp but Bruno came in and comfortably took that top spot! Very few people will argue with this except die hard Pogba fans. Bruno came in and took his "freedom role" in the team because he does it better. Everyone said you have to let Pogba be free of responsibility and just use his attacking gifts, but I never felt he was a specialist attacking midfielder or could justify that freedom.
I hate making this a Bruno vs Pogba thing. That said, I don't recall Pogba ever winning the player of the month awards as much as Bruno has in 2020. Maybe the league is biased towards Bruno or the league just doesn't think Paul delivered Bruno's level of performance/impact for similar sustained periods. Most can see that we wanted Pogba to have the impact that Bruno is having.