(not trying to be rude here) but technically it can be!! trans is identifying with a gender you aren't born with at birth, which means that yes, technically non binary people are trans cause they don't fit a gender binary (I hope this made sense, again not trying to be rude ^^)
calling someones gender isn't cringe and yeah there may be some people who find out about their pronouns before others if that's what you find cringe but honestly just stop