This kind of damage happens quite frequently when the bike tumbles over and 180kg land on the small, poor lever. I never heard about a lever breaking when rammed by an opening door - if so, the guy with the door probably will see quite a dent
However, check the whole bike for damage, especially if the handlebar is still symetric and not bent in any way. Possibly someone knocked it over and, when noone was looking, lifted it and pretended to be invisible.
When the lever is bent you may not be able to pull it all the way. But it´s easy to replace: the bolt with the 10mm head similarily is the axis the lever is turning in. The bolt is fastened with a 8mm nut (or maybe 7 or 9mm - couldn´t see it well) from below. Open it up, push out the bolt and fumble out the clutch cable - it´s simply hooked up.
Take care of the small pin that is plugged in a little whole in the control´s case. It probably will take the flight if given the chance. It operates the kill switch to ensure you´re pulling the clutch when you try to start the bike.
Regards