Hololens2 MRTK2 - ScrollingObjectCollection with dymaic prefab doesn't work - hololens

Just for studing purpose,I am play with the MRTK Scrolling object, as you can see from the picture below the example works fine with some static 3D objecst, but if add trought a script a Dynamic Prefabs there is no way to see the objects visible even on the inspector is not possible set the visibility.)
Please note that the script works fine outside of the scrolling and please not that the example comes from
MRTK/Examples/Demos/ScrollingObjectCollection/Scripts
Am i wronge something? The idea is to create a scrollable dynamic components,if you have any tips i would be more than happy because i am stuck :-)
MRTK version 2.8.3
thanks in advance for your help

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