The short answer is . WhatsApp does not send a direct push notification or a "You have been unblocked" message to a contact. This design choice protects the privacy of the person who initiated the block, allowing them to reconnect without the pressure of an immediate alert.
You look at the text input field. It is empty, white, terrifyingly pristine. The ball is in your court. The digital door has been unlocked, but the threshold remains the hardest place to stand. whatsapp unblock notification 2025