Unless, I can't find the page for some reason...
I know the one you are talking about and it might still be lurking somewhere in a dark internet alley after they rebranded Wix Code to Wix Corvid if they haven't simply taken that page down themselves.
However you can still request a nodeJS through the Wix Package Manager itself or go through Wix Support to request it yourself.
@givemeawhisky Thanks, was looking for that too. Turns out my request was approved.