How to show Blank Spaces on your iPhone lock screen
Show your Blank Spaces widget on the iPhone lock screen with a single menu toggle.
By default, Blank Spaces shows only on your home screen. You can also show it on your iPhone lock screen with a single toggle in the customization menu.
Open the Blank Spaces app and tap the paintbrush icon in the top right.
Tap the Lock screen tab.
Under Visibility, change to Show on lock screen.