They will only put it on the plate for him if he is free or has space to exploit in the middle or if he can free himself from the markers. If you want to play the cross and score type of play, you must play formations that have DL, DR, ML and MR, for example, 4-4-2 and 4-5-1. You can still play the cross and score type of play, though to a lesser extent if you have DL and DR only, but then, you must instruct them to attack (red arrows). Passing instructions is also important; more likely it should not be long.
Take into consideration that 4-3N-2W-1 is not 4-5-1(V). I have enough experience with 4-3N-2W-1. It is one of the formations that I wanted to make as my main formations but it did not work like I wanted so far. And yes, like you said, you expect the wingers to go and cross, but this game lacks individual instructions. Else, you would have instructed your wingers to run on the wing and try to cross. It seems that what is in the game as default for wingers is to run on the wing, go inside and shoot.