When I first started HRT a year ago, a few months into HRT, I had multiple dreams in where I was cis female. I loved every second of it. This only lasted for a week. Then all of my dreams after that either had me as genderless or had me as a trans woman. It's been more than a year later, still dreaming I'm a trans woman. I suspect it'll stay like that after I finally start to see myself as feminine, because I still struggle with seeing myself as masculine due to my face, my bottom organs, etc. I think once I get all of my surgeries done, I will see a substantial shift in my dream gender when my dysphoria is much less. Fingers and toes crossed.