Why my "Get Component in Children" looks and react differently in AR Marker tutorial

Hi Guys,
I am new to unity.

I am doing AR marker tutorial but was stuck when I am trying to get reference to display on Canvas. When I search and add node, there are quite a lot "get component in children", I searched the closes one and added to the graph. But somehow it do not look the same as the tutorial’s node. When i tested it on Play Mode, it did not function as well.

May I know what could have went wrong?

Thanks and look forward to your help.