Unknown Sources - Core Application Launching Sub-Executables

We are working on an application that has a core area for player interaction, then launches executables for players to experience together. 

This works fine if "Unknown Sources" are allowed in the user's General Settings, but runs into an Unknown Sources error/warning if they are not.  

We have tried to go the deep link integration route (via https://developer.oculus.com/documentation/platform/latest/concepts/dg-deeplinking/ ), but it simply didn't work. 

Is there anyway to launch our executables in a way that doesn't trigger the Unknown Sources error?