Thats my point, you can register an account on the dev website but you can't access to the page "Developer Support" with the platforms dropdown on the side without being manually approved by Nintendo
The 4chan screenshot page is not possible to access if you haven't been granted access by Nintendo.
It proves that the 4chan screenshot comes from a dev account manually approved by Nintendo, NX 2 could have been added by inspect element possibly - unless a Dev with Switch access rights can confirm or not
All of those details are irrelevant.
Its ridiculously easy to fake that screenshot,
and if there is not one insider mentioning it or hinting towards it, then you can be sure that its fake, simply it would mean devs started to get access to dev tools, and that would leak.
And the moment devs start to get access to those pages,
enough would be there that there is NO risk in leaking such a screenshot, meaning people would be less worried about NDAs, since you cant track it back to its source.
It would arguably be easy to make different dev tools leaks, just take the switch ones, and change some lines with refferences, take a screenshot, and argue its for switch to. Take a unreal engine target manifest, and adapt it, and you have a switch 2 leak.
And why dont we hear people on the inside clear it up if its a legit leak?
Because there are to many fake leaks on 4chan, all the fucking time.
They only react if one of them actually is a leak, if its getting ignored, then you can be confident its fake.