The Home Launcher of Android 10 doesn't allow any app to hide all entries, so we are forced to cancel the feature of the "Hide Icon". We recommend using the feature of the "Icon Disguise" which is more stable.

The “Icon Disguise” feature can disguise "GalleryVault" as a calculator, then you will see the calculator icon on your launch, and no one knows the existence of GalleryVault except you. 
We apologize for the inconvenience that this may cause to you.

How to disguise icon?