This sounds like my son. I never had him officially labeled. He's in his mid-twenties so ASD didn't seem like a label to pursue because it wouldn't benefit him in any way as a child. He developed obsessive interests and would drill down on topics to the point he could become a walking encyclopedia. He was kind, thoughtful, and very masculine in his preferences for how he dressed, hairstyle, etc. Rarely would you find him NOT wearing a plaid shirt, relaxed jeans and boots. He liked video games, DnD, computers, physics, chemistry. Then he went to college and COVID hit. It stressed him out totally. He saw a counselor through the school. Suddenly he was gay (never had any indication or a boyfriend or any interests in his peers in general) and then trans. He moved from blue plaid shirts to pink ones and relaxed jeans to skinny ones and girls boots. I'd like to wring the counselors neck and would love it if the next wildfire in the vicinity of the university allowed the whole place to burn down.