Board Game Arena

I wrote up some rules for New Frontier so that people can learn the game without downloading the PDF, but they are not displayed?

Do you mean this? https://en.doc.boardgamearena.com/Gamehelpnewfrontiers

It's shown in the rules summary on the game's page (but probably only in English). It also appears in the "How to play?" tab while playing the game.

Oh thank you. It's showing now for me too.