I need to reflect on this more, but I am not optimistic that such a resource exists.
Some background on why I say that. I am relatively old, and I started researching trans stuff in the 1970’s the golden era for gatekeepers.
At the time, it would hurt your chances for care if you weren’t het. Also at the time was the expectation that you’d cross over, fade into cis-land and be on your own (not “isolated”, a bit of nuance) in obscurity.
So from a historical perspective, the “being not queer enough” was baked into the original plan from those times.
I realize that I am old and things change. So I don’t know what the current transhet experience is.
If a gathering of resources doesn't exist, then it’s time to start a hashtag #TransHet to start gathering them.
I am not sure what the resources will look like, but maybe you or that guy could DM me to discuss.