I was working on some racial feats for a few races that are based in Greek mythology, when I noticed that some of the officially released races are just missing from the racial prerequisites section.  So far it seems that I cannot put a racial prerequisite in place for the following races.

• Leonin
• Satyr
• Fairy
• Harengon
• Centaur
• Loxodon
• Minotaur
• Simic Hybrid
• Vedalken

I find it odd that we can create specific feats for other races but for some reason these races are excluded from having their own unique feats. For my personal example I wanted to make a feat for Leonin based around the Nemean lion, But I can't get the feat to appear for just that race. Is their a reason for this or did the site just miss adding them to some places.

couldn't get it to actually show the example screenshot here on the site so this is the link to the screenshot. which shows the missing Leonin race.

https://gyazo.com/c14cff2f06fd5461771dedab65d10155 

The new races from M3 aren’t showing up as options either. 

Only the races that were already published when Xanathar’s Guide was published are available for racial feats. Since WotC has not published any more racial feats since Xanathar’s Guide, the list on DDB has never been updated.