Generally, messages sent while the person was blocked are not delivered to your phone after you unblock them. Troubleshooting: Cannot Find the Number?
Accidentally blocked a contact? Or maybe you’ve resolved things with someone and want to see their messages and calls again. Either way, unblocking a number on an iPhone takes just a few taps. Here’s how to do it. how to unblock phone numbers on an iphone
If you have a very long blocked list (e.g., thousands of entries), finding one specific number can be hard because the list is not in alphabetical order. Generally, messages sent while the person was blocked
This is the most reliable method because it shows you a list of every single number and email address you have blocked. It is the best way to manage your block list. thousands of entries)