Adding any emoji as a reaction remains under review.
I am marking this as partially done to let you know a new reactions bar with Like, Heart, Laugh, Surprised, Sad, and Angry has begun rolling out to all users.
The feature team is still working away on this feature request. No new updates at this time.
-Warrentaylor kelsey commented
would love an update on this
Clippy is flattered by all the attention but plans to continue his retirement.