so, I know neither mastodon nor *key can handle correctly: -receiving both a like and a reaction on the same post -receiving multiple reactions on the same post
(btw you might already know but since I almost only use custom emoji, in my case you can know by checking the emoji instance domain. the only Unicode one I use is the blue heart)
@kitten ( we don't even see the domain in most clients; patching the software to show more info is on my long todo list … it should be in the database somewhere )
@kitten yeah … the domain is included in alt-text. Which can be shown, but isn't really that "the client displays information outright". Mobile apps tend to not show it at all, and even if they would … it is only a workaround for single-user instances ):