I recently snagged one, but I don't have the option to put it in my ornament inventory like I do my other ornaments.

It says that it's coming soon. So must not be ready to be put on a tree yet. ._.

If you look at the list of ornaments, it says 'coming soon'. There are a couple like that, they're probably waiting for the art or something.

Aha, I see that on the list now. I guess I thought if it was ready enough to sell in the Holiday shop, it was ready enough to put on the tree. Oh well. Thank you both!