I'm creating a homebrew half-dragon race, and including chromatic, gem, and metallic dragon ancestry. I've made the race and the subraces, but I can't add racial features to the subraces, only to the base race. Is there any way to fix this?

What do you mean? What/how/why are you not able to add subclass features? I can’t help unless I know what the problem is.

At the bottom of the page of the subrace, there's a tab that says "Racial Traits." Usually, you'd be able to add features or edit any features you've added. The option to add features is completely absent.

It works fine for the main race, but not for the subraces. 

Unless there's a way to upload images, there's not much of a clearer description I can give. 

Turn your phone sideways, it just needs a wider display. Turning your phone to landscape orientation should solve it for you.

PS- There is a way to embed images (as long as they are hosted elsewhere), it also just requires a wider display.

Thanks, I never would've thought to do that.