The Gmail mobile app does not have a dedicated "Blocked Addresses" tab in its internal settings, but you can still unblock users:
If you have an email from the sender in your folder or inbox, you can unblock them quickly: Open the message from the sender. how do i unblock emails on gmail
Here is the straightforward answer to how to do it, along with a few "did you know?" facts that often make these articles interesting. The Gmail mobile app does not have a
This review explains not just the mechanical steps but also why emails get blocked, the difference between blocking and spam, and what to do if unblocking doesn’t immediately fix the issue. the difference between blocking and spam