The WhatsApp integration includes the following Triggers:

Reaction Added

The Reaction Added Trigger executes when the WhatsApp user adds a reaction to a message:
Reaction added
It receives the whatsapp:reactionAdded event, which contains the following payload:
payload
object

Reaction Removed

The Reaction Added Trigger executes when the WhatsApp user removes a reaction to a message:
Reaction removed
It receives the whatsapp:reactionRemoved event, which contains the following payload:
payload
object