Can an emoji get me banned from a platform?

Yes, indirectly. Some emojis are flagged in certain contexts as euphemisms — 🍑 🍆 for adult content, 💊 for drug sales, 🔫 in violent threats. Platforms combine emoji usage with the surrounding text to detect TOS violations. The emoji itself isn't banned, but repeated use in policy-violating context can get an account suspended.