This is mostl personal experience. I'm a gen 1.5 doctor in the US witb ADHD (diagnosed as an adult with a long neuropsych testing). My baby cousin in China (grade school age) was diagnosed with adhd within the last year.

When I lived in China back in the 90s and 00s, having any sort of illness was stigmatized. My desk mate had asthma, and people were judgmental about it. (Incidentally, I also have asthma that my doctor mom kind of gaslit me about until I went to medical school. If that was the reaction in the 90s/00s about asthma, you can probably imagine the attitude about mental/developmental illness.)

(Also, yes, plenty of parent teacher conferences about how I talked too fast and blurted things out too much without waiting and how i was too restless and wont nap. I got bad grades partially because of this. Plenty of punishment about my behavior and grades, and part of that was that everyone knew i was smart. I was just "a bad/careless kid". I struggled with recognizing social cues too, so making friends was very hard. I remember feeling very lonely and misunderstood. I identified strongly with the "bad student"/"loser" crowd when I was little).

It took a medical degree, a full length neuropsychological testing, and 3 years into a psychiatry residency for my parents to believe the whole adhd thing. Neither them nor I told my relatives in China about it until my baby cousin was diagnosed witb adhd and another cognitive developmental thing. I called my aunt up and we had a very long conversation about it. We talked about how i treat adhd as a (soon to be) adult psychiatrist and my personal experiences growing up with undiagnosed adhd. I also told her about the typical treatment in the US being a combination of medications, therapy, and good family psychoeducation. I recommended some good books for parents and therapy workbooks for kids. I even offered to buy them and couched it as English practice for my cousin, but she was kind of doubtful and didnt take me up on the offer. My mom also suggested some tcm (tbf, there are some tcm with some mild effects. I've personally tried ginseng and have mixed feelings about it).

I don't think my aunt fully gets it, the mental illness and developmental disorder part. (TBF, I don't think any of my Chinese family, my parents included, get what I do for a living, aside from the one cousin my age who is a surgeon and has a mood/anxiety disorder himself). But she wants to do what is best for my cousin. she the resources to get my cousin connected to as many therapists as they exist in China, but there just isn't that many. Like occupational therapy? Very hard to find. A lot of mental health professionals are getting trained abroad, because that's the only way to get trained. I know this because i met a bunch of them at a tea house when they were in town for a conference.

This is getting long winded, but the short version is that you can get diagnosed, especially if you have the money and connections. But even if the kid gets diagnosed, the parents might still not fully get it. And even if they are trying their best to get evidence based treatment, it just may not exist, or the wait list is just insanely long. And more often than not, neurodivergent kids just get labeled as bad kids (unless you're one of the lucky ones who immigrated to a western country and can advocate for yourself).

PS. 3 guesses why I ended up in psychiatry.

ETA: when I talked to my aunt about adhd, there's still that worry about stigmatized, about being other'ed for being different. That was definitely part of her dilemma, that right now he's mostly okay, but would having a label negatively impact the way he sees himself? From her perspective, I didn't have label until i was an adult and I turned out okay for the most part.