I feel as though I am scraping the icing off of the cake and there is so much work to do. I am not sure I am making progress with trust.
I can understand this - I too have a shit load of developmental trauma and have had to deal with massive trust issues and relationship stuff and honestly, I've found that turning up, working on whatever was around for me session by session has really made a difference. By that I don't mean "weekly reporting" that x, y and z happened - I mean really taking about how I feel about myself, my relationships with others, my relationship with her, what Ive struggled with, why I think I'm struggling, how I feel about how I'm doing, where I feel stuck, where I feel I'm moving all has helped.
Sometimes that means talking directly about something traumatic, sometimes not but there's always something of depth in our work. To work at any kind of depth means trusting, so as you gradually deepen the work, trust deepens too, and as you learn to trust your T, it becomes easier to trust other people - or to know who you can and can't trust.
I don't think it's possible to work on trust without trusting - so at some point you need to take risks, maybe tiny steps but if you find yourself thinking "I can't say that, take that, be that way with T", it's probably the thing you need to take.
For me recovery hasn't been an orderly working in one thing st a time, set goals, tick things off the list and move forward thing. It's been a back and forth, one step forward, two steps back thing without clear tick box steps to follow but that relationship, the intimacy and trust I find there, has been the most healing thing ever. Not tidy, but very healing.
Think about your relationship with T when you first started seeing her, are you able to talk about stuff now that you couldn't then, are you more or less anxious, more able to be a bit open (try not to think about what you would like to do but haven't yet, look at what's changed, what you're able to do that you couldn't when you started). Trust is a gradual thing - so don't look week to week or even month to month...