Self-confidence is helpful alongside agency, but I think it's a totally different concept.
Agency is about self-awareness and realizing that you have a choice. Lack of agency means going along with the default, societal script or what is handed to you even if it is not a good option for you.
One example is dropping out of a university program, even if you are capable of graduating. There is a strong social expectation that you finish, but maybe you don't like it, or your time is better spent elsewhere. Agency is that realization that you can choose.
Agency is about self-awareness and realizing that you have a choice. Lack of agency means going along with the default, societal script or what is handed to you even if it is not a good option for you.
One example is dropping out of a university program, even if you are capable of graduating. There is a strong social expectation that you finish, but maybe you don't like it, or your time is better spent elsewhere. Agency is that realization that you can choose.