Need to Permanently remove do not disturb

While Do Not Disturb and Focus features cannot be fully removed, you can effectively disable its function:

1. Go to Settings → Focus
2. Delete all Focuses except Do Not Disturb
   1. Tap the Focus
   2. Scroll down to the bottom
   3. Tap Delete Focus
   4. Repeat for each Focus
3. Disable Do Not Disturb
   1. Go back to the main Focus settings screen
   2. Tap Do Not Disturb
   3. Tap People
   4. Set to Silence Notifications From
   5. Remove everyone silenced
   6. Tap Back → Notifications
   7. Set to Silence Notification From
   8. Remove all silenced apps
   9. Tap Back, then scroll down to the bottom
   10. Remove all schedules and filters

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[Edited by Moderator]

Refer to: Set up a Focus on iPhone - Apple Support

Turn on Focus

1. Go to Settings > Focus. 

2. Tap a provided Focus option—like Do Not Disturb, Personal, Sleep, or Work—then tap Customize Focus.

3. Set up your Focus. You can select allowed or silenced notifications from people and apps, connect your Lock Screen or Home Screen, have this Focus turn on automatically, and add Focus filters.

2NumForIce wrote:

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