I appreciate your feedback. In fact, there is a section where you can add apps to the library, and there is clearly a process by which it can scan apps that have been download that are locally on your system in the apps folder to then add them to the library in case they were not added prior.
I agree it is not a general app launcher, but it can certainly launch apps of the type that it already launches, and all of these are of that type.
So, there must be a way to do that, and I'd like to have someone who has done that tell me how.
Either a system developer could explain how the system recognizes that a downloaded app can be added to the system, and I think it has something to do with the related folders that come down with the application but I can't figure it out. Or someone who has figured it out can explain to me what they they have done.
It doesn't sound like you have done that, so I don't want your comment to to confuse people because clearly it's possible. If you don't know how that's fine, please remove your comment.