She has a reputation that 'commands' attention/respect. [=people give her respect/attention because of her reputation]
In the United States, the President as the commander in chief is at the head of the military 'chain of command'.
She seems to be 'in (full) command of' the situation. [=she seems to have complete control of the situation]
(..) How much more defeated do you want them to be? - They're on their knees. - They are breathing. Look around you, friend. We won. I obey my queen's commands, not yours. And what are the queen's commands? "Kill all who follow Cersei Lannister." These are free men. (..)2019 TvShow: Game of Thrones Title: The Iron Throne Season: 8 Episode 6