What emoji combinations are supported in Gboard's "emoji ktichen"? Google released a feature in Gboard where one can combine two emojis to create a sticker in Feb last year, before expanding it in December.
Is there a list of which emoji combinations are supported?
I don't know of an exhaustive list, and I expect it would be a fast-moving target because the hybrid emojis are stickers instead of unicode.  Emojipedia and Google both have blog posts about Emoji Kitchen, and the subtext on both is that Google expects the set to grow over time.