Why are there so many white children being born with learning disabilities?

Father of 2 here. Whenever i meet fellow parents in particular the women, the married ones as well as the single mothers, i'm always shocked by how flippantly they tell me "she has a learning disability" "oh my youngest has got autism", "see my oldest has been diagnosed with ADHD", "mate try having one with autism it can be a nightmare", "she's got dyslexia innit"

It's always always white women talking like this as if it's a badge of honor. They speak as if it's completely normal and no big deal for their children to be labeled as having a disability. And it seems to occur so much. I am 34 and don't ever remember white children or any children for that matter having autism and all these problems with nearly as much regularity as recent as even the 90s. It was seen as irregular for young infants to be diagnosed as autists like this. These are white kids too so racemixing can't be the cause.