Except sideloaded apps are stuck in the "unknown sources" category which has no icons, no sorting, no search and is sorted in "last installed" order and nothing else.

Or you can install an app launcher which is also stuck in "unknown sources". So you have to find your app launcher and launch that first - which rather cancels out any advantage an app launcher would bring.

It's a huge disadvantage and and makes running sideloaded apps you use regularly a real pain.