There are two ways to make a background transparent ... eye icon to the left to hide it from view. Nothing on the actual image canvas should change, because the duplicate Layer 1 is on top of ...

When the phone is powered off, these molecules form a white cloudy composition, but once activated with electric current (flowing through transparent wires), they realign to form text, icons ...

Another app that you can pair with Clear Spaces if you want even more options is Transparent App Icons. As the name implies, you can create individual transparent apps. Back to Clear Spaces ...