trans people never *have to* disclose being trans in the context of any interpersonal relationships.
trans people don’t even have to disclose being trans to all medical professionals (in fact many times we shouldn’t, see: transgender broken arm syndrome)
Trans people DO NOT have to tell you they're trans unless they have romantic intentions with you..
That means if you, as a straight man ask me out on a date, I'm not obliged to tell you until AFTER the date if I have interest with you