One of my homepages disappears when iPhone is in ‘sleep’ mode

Go to Focus>Sleep>Customize Screens. You want the second one where you can "Choose a Home Screen Page". Make sure that you have all your screens selected.

Thanks for the additional information, Lady_danger. The following link can help explain how to Set up Focus on iPhone.

If everything is set up correctly, and the issue remains, please Contact Apple Support.

Regards.

Hello Ladyy_danger,

Thanks for posting in Apple Support Communities.

This appears to be unexpected behavior. In that case, the following steps may be able to help resolve the issue:

• Restart your iPhone. This will allow your iPhone and the software to be refreshed. 

" 1. Press and hold either volume button and the side button until the power-off slider appears.

2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.

3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo."

• Update your iPhone. Completing this step often times resolves issues that are related to the software. Be sure to secure your data with a backup before proceeding. 

Let us know if this helps.

Take care!

I can imagine that would be very disconcerting! I do use the feature with my Work focus. It hides everything but essential apps during working hours. I like to pretend it makes me more productive.