We have two product updates for you.
You can now use emojis in buttons. Use it wisely to improve your user experience. Please note that markdown (like bold and italics) are not allowed in buttons.
We deprecated 'templates' from sandbox accounts. Over the last few months templates have change a lot and we can no longer offer a sandboxed template experience. To prevent any confusion we removed it from sandbox accounts completely.
You can read more details on Learn. Please reach out if you have any questions!