Syntax Highlighting not working

[dataO1]

The syntax highlighting doesnt seem to work.
Im using NVIM v0.4.3 and started from a plain init.vim file, with just the minimal requirements for this plugin (pathogen installation).

Heres a screenshot(the styling comes from my terminal, which is 'kitty'):

[tankorsmash]

Maybe this isn't supposed on regular Vim (gvim8.2 on Windows), but isn't working for me either. Not sure how to debug this to add more info, in case these are related.

and :syntax lists a bunch of haskell-specific looking things

edit midquestion: it appears that my color scheme is to blame. :colo gruvbox was above. :colo molokai

and :colo solarized

look fine. So maybe this is a user-issue after all.