The answer to this question is both yes and no. It is possible to unblock yourself from WhatsApp, but it depends on who blocked you and why.
If You Blocked Yourself
If you blocked yourself on WhatsApp, then it’s very easy to unblock yourself. All you have to do is open the app, go to Settings > Account > Privacy > Blocked Contacts, and unblock yourself from the list of blocked contacts. Once you have done that, you will be able to message and call people again.
If Someone Else Blocked You
If someone else has blocked your number on WhatsApp, then it’s a bit more complicated. You cannot directly unblock yourself from their account; they will have to do it manually.
To get them to unblock you, you can try sending them a message asking them why they blocked you and apologizing if necessary. If they still refuse to unblock you, then unfortunately there is nothing else that can be done.
In conclusion, whether or not you can unblock yourself on WhatsApp depends on who blocked your number – if it was you then it’s very easy to unblock yourself, but if someone else did then they will have to do it manually.