So good to hear!
I recently told my own adult children, a 20 yo daughter and 22 yo son, what is up with me. I told each of then separately a few weeks apart. Both were immediately supportive, seemingly without reservation. They both accompanied me (seperately) to a therapist session, not so much for concerns they have but just to meet who I have been working with and be supportive with my transition.
My wife had reservations about telling my daughter when I did because she has been seeing a guy she is all gaga over for about four months and my wife was afraid this would drive him off (he is a welder in a shipyard building nuclear submarines). I told my daughter anyway. After I told her we went to a restaurant for lunch and talked about things. I mentioned to her my wife's concern about her bf and my daughters response was "if he doesn't like something about my family I'll dump him, my family is much more important than some guy"!
That evening my daughter told her bf about what is going on. She later told my wife that as they discussed it her bf was cool with it and was even referring to me as she and her!!
Perhaps we raised them properly and/or it's a generational thing but my kids are awesome.