When a user assigns an icon to a tag in the inbox, it pulls from the "emoji" gallery. Front currently allows a user to upload custom "emojis," but apparently does not have capability for those uploaded images (emojis) to be assigned to a tag even though they show up in the gallery where the user chooses the icon for the tag. This would be helpful for teams that want to have custom tags with unique icons.
I'm really sad that this isn't an option yet. As a travel agency, we work with a large number of vendors and being limited to the small range of colors and the stock emojis makes it hard to differentiate between them. Would really love to see this become available as soon as possible.
Same thing for views. It would be helpful (and fun!) to be able to add custom emojis to both tags and views to be able to help teams visually differentiate between them when using these features a lot.