I haven't read the whole thread because, based on past experience, some of the replies are likely to drive me to the point of meltdown due to the level of misunderstanding involved.... I also won't be returning to read any replies for the same reason.
I know the example you mentioned was related to struggles with ADHD, but also asked what a neurotypical person is, and mentioned NT/ND struggles in general.... so I hope it is appropriate to comment based on wider neurodivergence.
I'm AuDHD and have Tourette's too, so don't know what it is like to be be neurotypical. However, some examples of my specific struggles associated with neurodivergence, which I don't necessarily think that many neurotypical people would relate to (and almost certainly not all of these struggles together/to the same extent that I do) include:
History of really extreme impulsivity, including randomly trying to get out of moving vehicles - things that could have caused me serious harm/death or got me arrested.
History of what I will delicately call "sensory seeking toileting behaviour" including inappropriate behaviour with urine and faeces as a child, including an older child/into my teens.
History of eating non-edible objects.
Extreme sensory sensitivities to the extent of this resulting in repeated/serious self-harm, even in public, if I can't escape certain overwhelming situations.
History of self-harm in general due to meltdowns/overwhelm.
Struggles due to the inattentive aspect of my ADHD leading to serious amounts of debt.
Needing a support worker to communicate for me in situations such as meetings with professionals, because my autistic communication is so misunderstood that those involved can't cope with it and tend to take extreme offence to my genuine attempts to communicate.
Social anxiety to the point that I have to cut my own hair because I cant cope with the hairdresser, have had bladder infections due to holding urine in because I can't cope with public toilets, have walked home late/alone at night in potentially dangerous situations because I can't cope with public transport etc.
Obsessive interests/hyperfixations to the point where they significantly affect my sleep, ability to remember to eat and use the toilet and my focus at work (yes I do work, related to an intense interest actually, but it comes with many challenges).
Tics which cause embassment (vocal tics) and physical pain (head and neck jerks). Inability to wear certain clothing because it triggers severe physical tics.
Relying on multiple apps which I have to use daily just to function, including tracking my water intake, because I constantly feel thirsty and have in the past accidentally consumed dangerous amounts of water.
I could on and on and on....these are just a few random examples that I thought of.
I hope it helps in some way to show that struggles associated with neurodivergence aren't necessarily similar to what many neurotypical people struggle with, just a bit worse, and that many of us genuinely do require significant amounts of support just to try to function.
Of course many neurotypical people have many of their own struggles. My diagnoses are simply a way of explaining my own.... in a way that is certainly helpful (to me at least) in terms of understanding.