With the 4-2-3-1 we have a CF and two wingers creating the space for him to operate in, whilst he is key to aid the distribution.
Now in those many games where opponents bunker up, we'll see the middle blocked and lots of wide play. In which he's vital for distribution, but not as visible. But he's very important
The moment we face an attacking team that naturally uses the wings, dybala becomes unlocked and shines much clearer.