This is a rare time that I disagree with you:Agree, which is why I think Sian Massey was correct to raise the flag when she did, well correct in the timing but not on the decision obviously. There's no way the player is about to score a goal and certainly doesn't have a clear run into the penalty area. Had Kavanagh blown straight away there would have been no VAR check, no one would have even know that her decision was marginally wrong and there would have been no controversy.
This is the moment the player is receiving the ball. This shows a clear path into the penalty area. This is a clear delay situation.
I think some more clarity around when an attack no longer exists, as momentum does slow I admit, but not enough to consider this attacking phase over.