Re adhd the impulsively can mean they struggle to do a task asked, easily diatracted or sidetracked. Also getting started, adhd impacts executive function and starting tasks can be incredibly hard. Or changing tasks, transitions so if they are hyper focused and in the middle of something getting them to stop because actually they need to do X, y, z again can be extremely hard. Time blindness also.
Autism transitions, anxiety, understa dignity depending on the autism and communication issues and capcity etc plus sensory issues.
Pda need for control, heightened flight and fight, anxiety. Sensory issues.
Tourettrs tics interupt what they are doing.
Many of these conditions are co.orbid witg each other and other things ie chronic fatigue, fibromyalgia, bowel issue hypermobilty etc all which can impact capacity, fatigue levels, plus issues related to fine and gross motor skills.
And thats just a basic bit about ND issues that can impact. There is more and obviously ND is not the only thing that can impact, there are a myriad of other issues and variatuon on normal development that can and do impact. Plus everyone's capacity varies.
There are so many ises that can impact with children, development and their ability to complete every day tasks. It really is not just about consistent parenting. I am not saying parenting strategies dont help, because some undoubtedly do but there are also children where they just dont or in the case of some things like pda, actually make things worse.
All of my 6 have been impacted in different ways and yet 4 of them were much more compliant or as my gran used to say "biddable" children.
The children in the school I work with have variety of issues that can and do impact.
Plus personality.