I have defined Status Reason Transitions defined, which I want to use in Powerapps, how can I do this?

Currently I have a combo box, which - according to theStatus Reason Transition rules I have in place - should only be showing Active, Draft and Proposed.

But as you can see it shows all of them, (and when I submit the form with a selection that doesn't follow the rules the record is still created)
ComboBox Items: Choices('Project State (Projects / Services)')
How can I get the items to be restricted by the Status Reason Transitions already in place? Or do I need to rebuild the rules in Powerapps?