Could you start a conversation with her about this topic? Say, start a session stating that you would like to discuss something specific, and then tell her what you've shared here and maybe ask if there is any particular reason why she controls the conversation so much.

I had the opposite issue in the first few months off and on with my T: he was too silent for my taste... I never have problem talking but I like it interactive and don't really enjoy just listening to myself with another person in the room. It wasn't only dissatisfying to me that way, it was frustrating. So one day I brought it up, we talked about it, and since then all my sessions have been pretty intense with back-and-forth, the way I like it and the way it benefits me most, I think. I often pause after a chain of thoughts and ask what he thinks so he does have the opportunity to go on tangents, and sometimes he does... then I either follow or take a turn again.

I do not believe that any therapy approach prescribes that the T needs to initiate and lead the sessions topics and about the focus and potential avoidance issue, I think that can be discussed to manage it in a mutually satisfying way.