Is that bias confirmation or is it confirmation bias? I get them mixed up.

I feel for OP. I really do. I want everyone to be treated as equals, honestly.

However, does OP even realize that their anecdotal experience doesn't even remotely satisfy the (heavy) burden of proof for their biased hypothesis?

In a blind study, everyone in a room going silent when a trans person talks is not necessarily experimentally a 1:1 to everyone in the room going silent when a biological male talks. MANY people that have transitioned (whether they want to admit it or not) have a noticeable difference in their vocal timbre than their biological counterparts. Maybe people went silent because they were fascinated by or fixated on the unusual timbre of the OP’s transitioned vocal cords. We will never know… and some of us realize that correlation does not equal causation.

For example, you wouldn’t conduct a scientific study where you’re attempting to show the differences between how males and females are treated and choose to have one of your control subjects be a trans male. It’s just different despite how inconvenient and hotly debated that truth is.

Additionally, OP was in the same department for years and then transitioned. So, naturally people would approach a more experienced person for help or advice regardless of perceived sex if they knew that person was there longer than them.

Obviously there are differences between how men and women are treated…but OP seems to be using the worst possible anecdotes to provide proof for their hypothesis without correcting for these sometimes subtle inconsistencies. Maybe OP thinks they pass as a male a lot more convincingly than they actually do.