open tracklogs isn't possible if offline

[Guzzist]

In MyRoute-App in section "Routes & Tracklogs", I can switch between the two lists "Routes" and "Tracklogs".
If app is in offline modus, I can see all routes (if they have been synched before). But only some of them can be opened to navigate.
But this is minor issue, I will discuss later.

But if I switch to list "Tracklogs" it's empty. I believe because tracklogs will not be synched.
But why? Can this be developed in near future?
How can I proceed, if I have got a gpx file with track in, to open it in MyRoute-App. I know, I can upload to MRA website. But how can it be used in offline MyRoute-App?

I could not find articles in forum nur in manuals.