SCORM course displays only on half of screen on mobile devices (phone and tablet)

Hello.

The problem is:

the Scorm package opened in Moodle app in portrait mode takes only half of screen. The rest space is occupied by a grey moodle bar (screenshot is attached). 

In landscape mode, this bar also takes some space, but not so crucial.  That's fine. But in vertical mode course display only on half of the screen, which really disturbs to perceive information. 

The tablet is Lenovo TB-7304F, the phone is Redmi 7.

Scorm package created in Articulate Rise (but the tool doesn't matter, Spring package had the same issue).