Ok. Since you weren't able to assist, I had to look some up online. I think I have learned a lot and am now confident that I can create a transgender joke that is both funny and non-offensive (e.g. it avoids slurs like "troon", it avoids dead-naming, and it avoids misgendering).
I asked 100 trans people what supports them the best. 5% said there co-workers. 10% said their friends. 15% said their parents. 20% said their partner. The rest didn't say anything and just hung around.