I think what you mean is.
When you touch one of the channels or faders it doesn't highlight as it would on the desktop cubase.
Also touching a fader doesn't then shift that highlight to the channel your touching, instead staying where it is on the desktop cubase.
This means that if you have any motor faders or contextual control devices like the cc121 for example it won't high light the channel and activate the ability to control it.
Basically you have to select it with your mouse on the desktop or use arrow keys, you can however use the app shortcut buttons for Left Right if your on the mixer screen or Up and Down if your on the project window.
That answer statement was way longer than it needs to be I apologise.
Yes your are right it doesn't
Only way to do it with the app is with the short cut bubbles left right up down.