I'd be bothered by your Ts approach. This might be more of my T speaking than me, but the part that bothers me the most is that she says there's one reality that is correct, and you need to accept it in order to work through it.

This bothers me because my T always goes on about the exact opposite. There's more than one reality for most things. For example, I might think my friend is stupid because he didn't reply to a text, and therefore I should block him and never talk to him again. A different reality might be he is stupid because he didn't reply, but we can still text sometimes. Another one would be the friend indeed had to get emergency surgery and therefore couldn't reply. And so on.

As far as I remember, the abuse your T talks about was not even sure to have happened, right? So there's already two options, it has happened or it has not. Now if it has, there are more sub-realities and likewise if it has not. And you can not choose which one is the reality for you. You can choose to believe that it is a possibility that abuse has happened. But I highly doubt it is necessary to accept the reality of abuse having happened in order to work through whatever you are struggling with.

Another part that bothers me is the fact that she says 'you don't know that's your reality'. She doesn't know either, she knows even less! My T always tells me to be vary of Ts that claim to know things about their clients that the client themselves does not know. That's simply not possible (at least not in the sense that you describe).
It feels to me like your T thinks abuse happened and she wants to convince you that it did. That doesn't sound like what I'd want to happen in my therapy or what I'd want my therapy to be about. If I don't believe I was abused, then it should not be a thing we discuss in therapy.

By the way, for perspective, after I described very clear abuse to my T, he at some point asked me whether I think I was abused. If I had said no, then I am pretty sure it would have never been discussed again. If the client thinks that something was fine, then it was fine to them until they say otherwise. Some people go through war and come back fine. Others have PTSD. If they are fine, you don't start to tell them they should have PTSD.