Quote ="Tyke's/Rhinos No. 1 Fan"Delaney is part of that tackle, and so is onside to play the ball, which he does, and scores.'"
Delaney had dropped off the tackle. So even if being in the tackle did make him onside (it doesn't) that wouldn't apply.
He was clearly in front of Leuluai when the ball touched Leuluai. He was offside. Whether Leuluai knocked on or didn't knock on the correct decision was always going to be a scrum to Leeds.