Sometimes the available reaction emojis (Heart, Surprised, Mad, thumbs up, and Laughing) isn't enough or don't quite fit the response you want. A feature I highly suggest would be to make it possible to react to a post with any of the available emojis on Microsoft teams, which would be similar to the feature available on Discord.
Ali Talebi commented
✔ as Done,
✖ as Canceled,
and 👎 as disagreed
are very useful for quick reaction I think.