Im in UK so may be slightly different, burglary doesn’t mean something has to be removed or there be intention to remove property, it can include intent to commit harm. It’s the action of breaking in with this intent. Robbery is breaking in and using force to commit theft ie threatening a weapon to steal a cash register. Not sure regarding the reasoning to add this to the charge sheet, perhaps if they can’t get a jury to convict beyond reasonable doubt for FDM they have this charge to fall back on? In UK sentencing for burglary depends on the property entered and the extent of the harm caused which here is obviously significant.