Menu pages

Check if you have hidden one or more of your Home Screen pages. Hold your fingers on a free spot on the home screen, tap the dots at the bottom above the dock. Put a ✓ in the home screens that you want to be visible.

Please note that some Focus profiles hide the home screen. Check this here: Settings → Focus, tap on the profiles you have, and look under Customize Screens, and select the Home Screen, to see if there are one or more pages that are excluded when the profile is active.

If Do Not Disturb or another Focus profile activates automatically, then a Schedule is active. 

To disable or delete this schedule, go to:

Settings → Focus → Select Profile → find SET A SCHEDULE → Tap into the time → tap Delete Schedule or just deactivate

You can read more about how to use Focus here:

Use Focus on your iPhone or iPad - Apple Support

Yes Focus unfortunately seems to cause more confusion than it is helpful. You're welcome.