Step 1. Open your Instagram account and login in if you have not done.
Step 2. 1. Tap on your profile picture in the bottom right, to go to the profile
Step 3. Here you will see three vertical lines at the top right corner tap on them
Step 4. And now click on the settings
Step 5. You will see the option name privacy click on that
Step 6. And then tap on blocked accounts
Step 6. To unblock someone on your block list. tap unlock on the right side of the name
Step 7. And Now, confirm to unblock
For More Methods to Block/Unblock Swipe Up