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]
(..) under heaven that does afflict our natures What, have you given him any hard words of late? No, my good lord. But as you did command, I did repel his letters and denied his access to me That hath made him mad I am sorry that with better speed and judgment I had not noted him (..)2015 Hamlet
(..) than heat, you must not take for fire For this time be somewhat scanter of your maiden presence Set your entreatments at a higher rate than a command to parley For Lord Hamlet, believe so much in him that he is royal... ...and with a larger tether may he walk than may be given you (..)2015 Hamlet