How to Add Blank Spaces to Your iPhone Home Screen Grid?
If you want to blank the homescreen without jailbreaking, the answer is to add blank icons to create those gaps. Then, you can add a blank row to organize your iPhone home screen, or move all your apps the the bottom of the screen instead of the top.
Step 1 Launch this website on Safari, then tap the Action button on the toolbar.
Step 2 Tap the Add to Home Screen button from the Share Sheet.
Step 3 Tap the Add button from the Share Sheet. Do not touch the title field, it will be pre-filled with an invisible character so that nothing shows below the icon.
Step 4 Repeat for however many blanks you want.
Step 5 Now long-press the icon, then you can move it around in jiggle-mode, just like any other icon, to make your fancy layout arrangement. Then you can change a black wallper, you will see as below.