Hi,
I am trying to add the new Power Apps grid control in a model-driven app for a custom table (type Standard), and trying to add child items from another custom table (type Activity), but in run time the related child records do not show up...

I tested for custom tables where they are both (type Standard) and it worked just fine!
I am not sure if there is anything else needed from my side, but appreciate if someone could confirm this behavior.
regards,
Mohammad