With the 2019 version, the Product Structure in Pixyz Review evolved into a totally manageable Product Tree with a focus centered on Occurrences. It was meant to simplifying the Product Structure by keeping only necessary occurrences and to let you create or customize them as you like.
This means that now, you just have to set your visual & interaction behavior as you were doing on a Motion Group, but directly on an occurrence.
For that, you can create components through the inspector panel for each occurrence you need to customize and to activate the settings you need. Interaction, visualization,... same behaviors as before are of course available.
Once added, this (these) component(s) can be set in the Inspector panel :