I created a Feat for the Feats contest, I saw it on IG, but it isn't publishable because the links for pages in the PHB on Beyond are registering as external links. I normally just copy paste that stuff. Could it be that I need to link the pages from the Free Basic Rules instead of the PHB?

Feat: Versatility - Feats - Homebrew - D&D Beyond

An "external link" is any standard web hyperlink even if it points to a D&D Beyond page. An internal link is a tooltip link such as this one for fireball. This forum thread has the most comprehensive guide to tooltips that I know of.

Quote from spamandtuna >>

I’m afraid the submission period for that contest has already ended, though.
https://www.dndbeyond.com/posts/2098-the-realms-will-know-your-name-a-forgotten-realms#:~:text=Contest Dates

 Ohhhh what the....  darn. This was a good Feat too! It should have been what they originally did with Versatile weapons. Oh well... maybe someone will add it once I fix the links and it will help their campaign. People have added my Ratkin Species and Monster. They'd love this.