From 105:00 to 121:53 (since Amad scored on 120:07) I timed every single game stoppage (throw-in, foul, goal-kick, yellow, corner, injury etc) because I'm a bit drunk and/or neurodivergent.
That amounted to 07:27 seconds. Just over a minute for Rashford's goal, almost 2 minutes for Amad's and almost a minute for their ginger's timewasting and subsequent yellow being the major stoppages.
So technically, he was was right to add on five except it isn't consistent because think of all the fouls, throw-ins, corners, injuries etc in 45 minutes halves, no way they all get added on. So it was definitely drama-infused injury time.