Changes that came in in 2020 means that the handball by the Burnley defender should have been given as a penalty.
https://www.bbc.co.uk/sport/football/54321867
The relevant bit is this: "a player will be penalised for handball if the hand/arm is clearly away from the body and outside the "body line".
His hand was away from his body, which was evident by the fact that the ball deflected behind his back for a corner. That wouldn't have happened if his hand had been adjacent to his body. A clear penalty.
The second Burnley goal should have been disallowed for a clear barge on O'brien at the start of the move. The ref gave several fouls against us for much less, for instance a foul given against Cullen in the first minute for the tiniest of pushes.