Ok, they made it sound like it was something WotC was putting out that had stuff left out the book.
Yeah, they weren't terribly clear.
Seemed pretty clear to me:
Expanded Racial Feats*
You'll get access to 16 new racial feats for all the races available on D&D Beyond outside the Player's Handbook - from the aarakocra to the yuan-ti pureblood. Created by the D&D Beyond team, these feats can be used in your home games or as inspiration for your own upcoming homebrew racial feats.
* - Expanded racial feats not available in Adventurers League play.