If you look at the first goal, Stevens, Browne, and Collins are standing in a straight line in front of Tchouameni, he has a clear line of sight to the far post. Duffy is standing on the other side of this "corridor", which further helps him because he knows he can't hit it too far to the right, otherwise Duffy clears it.
It's the only shot he has, and he takes it.
Also, on the recent rugby talk, the way Mbappe lays it off is a textbook set up for a drop at goal