The can be an emerging picture with ASD and ADHD, which is clouded by LDs, though.
With DD1, I was told I was neurotic because even as a tiny baby, I was saying there was something not right with her development. I was literally told "Lougle, every baby is different. Stop being a nurse, stop reading the textbooks. Be a mother and enjoy your baby."
DD1's behaviour was so hard to manage. She was completely wired. She didn't sleep at night for the first 12 weeks. At all. She would scream from 10.30pm until 7.30am. After 12 weeks she started to settle at 6.30am, then 4.30am, then 2.30 am, etc. She couldn't support herself well, but when she learned to crawl, she would escape as fast as she could. When she finally walked (late), she could climb before she could walk properly, but she was very wobbly and had some very near misses when she climbed on top of things and almost fell off.
She was identified as being 'behind' at 2.6, then started falling over spontaneously. Then she was diagnosed with epilepsy. From there, she was diagnosed with global developmental delay. A CT scan was normal, I was told smugly by the paediatrician. However, a few months later, the MRI scan showed a brain malformation.
For the next 11 years, the paediatrician (who had a special interest in ASD) occasionally pondered whether she had just an LD, or whether she also had ASD. Her learning needs took priority. However, by 15 she had an eating disorder, partly as a result of COVID changes. After that, she was put on the ASD assessment waiting list and eventually diagnosed with ASD.
She clearly has ADHD but we can't get that assessed because it's too unclear how much her brain malformation and learning disability affect her attention. She has a very low attention span.
DD1 is considered very autistic with co morbid mental health difficulties and she will never live independently.
I guess what I'm saying is that the path to diagnosis is complex and unless a child has classic ASD with overt presentations or a clear regressive history, it's not a simple diagnostic procedure.