The game does not push the player forward unless the ball is on that side, the moment the ball is not near them they retreat too far back to make a back 4 with the CB.
It also feels that the moment the ball is no longer near them a magnet is pulling them back to a fullback position defeating the point of this role.
Possible Solution
look back at the coding of the attacking wingbacks on eafc25 as it worked exactly as intended for an attacking wingback.
The players would push up higher when the CB were on the ball for passing out the back and would attack the space on their side ahead of them regardless of the position on the ball being on their side. ( where the ball is should not be the permission of if they are allow to attack open space when you are in possession)