Vmware support solved it.
It is easy:
mark the app in the app list
click "manage devices"
filter for "installed"
Well, it is not really solved.
Of course I can force update by installing the app again, but this "pending check" keeps staying forever.
Some apps are updated every few weeks, but some keep staying in "pending check" forever, even when new versions are available.
Why would you not set it up for Auto Update?
Even after it is set to "auto update" it still shows "pending check".
In the meantime again a new version of this app was available.
But it does not auto update it.
There are apps which I uodate manually, but the show "update available" and there are some apps which are automatically updated.
But a few apps keeps staying "pending check". And when I check in the app store and I see a newer version
I manually install the app again on the devices. Then the new version is installed, but in the MDM it is always "pending check".