I don’t know where all this possible offside stuff has come from that I’m reading about, but I can guarantee you that they didn’t even check for an offside. If they had they would have shown it on the VAR replays with all the lines before or after checking the handballIt possibly being 1mm offside (debatable) will surely be the excuse they go with, that way they can justify why they didn't call the ref over to the monitor.