How does distributed propulsion work in a pusher configuration?
The wings don't benefit all that much.  Look at a small airplane from head on - how much wing is directly behind the prop?

My airplane for example, the prop is 86" diameter. The fuselage is 46" wide - so 20" of wing on either side is behind the prop.
The wing itself is 35'6", or 426", so less than 1/10" is in direct prop airflow.

The prop pulls the plane forward, airflow over/under the wing then creates the lift.