Click on the person's name you want to mute/unmute. Tap on the "i" Details button on top right. Here you will see a checkbox for muting/unmuting messages. Where Did The Mute Button Go On Instagram?

Go to the Instagram profile of the person or account you want to unmute. 2. Tap Following, located toward the left side of the screen. 3. Select the Mute section. 4. Toggle off the mute option ...