Ok, got it working now, was a bit confusing to to figure it out...
In View Mode Setting > Shooting > ONLY 1. option (Eye sensor) and 4. option (VF+EyeSensor-VF only+Sensor) result in the desired VF image playback function.
My View Mode Setting > Playback - was set to > Eye Sensor - This has no impact on that function, very unlogic in my opinion.
Any way, problem solved, thanks again 👍