It seems that the zoom is oriented at the "widest" niveau.
If I hide the surrounding - niveaus I can zoom closer.
I dont have this limitation on desktop ....

Are you sure it's the same project? A different selected level, which levels are visible, objects over a wider area, a selected object, all of these can change the behavior of the zoom. The exact same situation should result in the same zoom behavior.
Have you tried scrolling with an external mouse?
Does the same happen if you have the 3Dview pane detached (separate window)?