I never had this issue because both of my Ts let me talk about whatever, but the current one is very interactive and has many thoughts and lines of investigation he likes to share. I like this highly interactive style a lot but often remind him that I want to talk about subject xyz, then he complies and has comments on that.

The way I imagine your situation, I would be upfront and ask the therapist why s/he wants to steer the topic and why not to talk about what you are interested in. Also tell them that you go to see them because of (whatever) and expect feedback on that, if it is not possible, you will look elsewhere. All very directly.

My first T let me choose and lead the topic but he kept pushing his theoretical agenda and approach on me (in the end, whatever I brought up). I left him in part because of that and looked for someone more open-minded and cooperative.