We have seen a few times that Ten Hag has moved Bruno to the right when we are struggling to break a team down, I remember earlier in the season, Rashford was brought on to play 10.
Against teams who play a low block, it looks like last 20/30 mins Ten Hag wants someone who can dribble in the 10 just to cause a bit of chaos.
I think it's more Bruno needs a little bit of time/space to be at his best. Often in the tigher pockets his lack of weight/strength lets him down. He gets bullied off the ball easily and doesn't like being touched and will often go down easily.
I don't remember many of his assists coming in those type of situations? perhaps a quick little flick or something but a lot of the time he loses it.
Out wide just like our 2nd goal, he can get his head up and use his fantastic vision/passing range to deliver a killer pass, and he's less likely to get bullied by a fullback.
Obviously in games where there is space for him to operate then it works fine as 10, but I think it's a smart adjustment especially against deep lying defences.