In theory, yes. If the trip actually made it through WS/OOBWS and was in the YS step, and THEN coverage was skipped with 23M7. It would just be pay/credit towards guarantee though, just like a YS.

But that would be silly of them to 23M7 the YS step, because YS aren't proffers. They would just award the trip to you and move on. It would be just like using 23M7 in the LC step of coverage with an available LC pilot. In theory, they could 23M7, but it would never make sense to not just assign the trip.