Hi hun,
There are binary folk who don't transition, and there are no binary folk who choose not to transition - like many here their journey to that point is similar, and as one who has chosen not to transition, (yet!), it has themes...
Dysphoria - we think we can manage - in the main we do, until we cannot. How we do it is individual to each person, but in the main, it allows us to maintain a status quo of sorts for some time.
Commitments - we have family, or work commitments that we are honouring, above ourselves - it's not healthy for us, but again it's about a status quo of sorts.
Fear. This is common too, of what we may be like (internal transphobia), struggle with confidence, or assertiveness; work in a highly gender biased area, or live in a community that is further along a political spectrum, and we can maintain appearances.
I am not out and proud to the world, but my partner knows, and the folk here. we are able to keep me healthy and happy enough. No I'm not living an authentic life in the main, but I am able to manage the need to do something, anything, about my dysphoria, for the time being.
Does it have anything to do with whether we are binary or non-binary - no, personally I dont think so - more that we have found a place where we can manage for now.
We know we are trans, and for me personally, I can mange each day for now - but are aware that this can change.
Hopefully this is a little insight into my choice to not transition at this time
(Hugs)
Rowan