Additional chat-related features and issues within Microsoft Teams for business
I was also having this same issue. I did the most recent update, and it's showing under my emoji button. I didn't have to type anything in, but the stickers, emojis, and GIFs are all under the emoji button icon, however, my coworker is having the same issue and isn't showing up under the emojis button or at all for that matter. Same company, same access, etc.