Usually its not explicit, but patterns happen can be seen. Sometimes its not obvious unless you are specifically looking for it or the one directly receiving the treatment.

Trans experiences are just one case where those patterns become a lot more obvious. I remember someone telling a story about how often transitioning, someone's father and brother started giving football explanations to her as if she were new to the sport when she'd been just as involved for her entire life. Its not like they were intentionally trying to be malicious, but they clearly subconsciously decided "woman needs to be taught how ball game works" even when its someone who they previous thought of as a man and didn't treat like that.

Of course cis women point out that same kind of treatment. And often people just think they're imagining things.