That should have been a goal
[irrelevant parts removed]
2. Offside offence
A player in an offside position at the moment the ball is played or touched* by a team-mate is only penalised on becoming involved in active play by:
interfering with an opponent by:
preventing an opponent from playing or being able to play the ball by clearly obstructing the opponent’s line of vision or
challenging an opponent for the ball or
clearly attempting to play a ball which is close when this action impacts on an opponent or
making an obvious action which clearly impacts on the ability of an opponent to play the ball
In situations where:
a player moving from, or standing in, an offside position is in the way of an opponent and interferes with the movement of the opponent towards the ball this is an offside offence if it impacts on the ability of the opponent to play or challenge for the ball; if the player moves into the way of an opponent and impedes the opponent's progress (e.g blocks the opponent) the offence should be penalised under Law 12
/
I haven't watched multiple slo-mo replays, but I don't think that met the criteria for offside.