Arsenal scores questionable goal vs. Manchester United

This goal is going to be talked about for a while. Should it have stood for Arsenal? Going up against Manchester United, Emile Smith Rowe delivered a volley to the back of the net.
However, David De Gea was on the ground injured well before the shot went off. Still, after a VAR check, it was ruled a goal. You tell us what you think?
Arsenal take an early 1-0 lead thanks to Smith Rowe. #MUNARS pic.twitter.com/Q3hspYsUHP
— NBC Sports Soccer (@NBCSportsSoccer) December 2, 2021
From our chair, this goal shouldn't have stood. While Fred was the one to hurt De Gea, the goalie was injured and Smith Rowe only fired up the prayer when he saw the goalie was down. Unreal.