This has been resolved.
Fix is to make the createObservableDataAction an export default instead of export const.
Creating a new data action will have this createObservableDataAction just like in the video guide.
Change it to:
export default Msdyn365.createObservableDataAction({
action: <Msdyn365.IAction<IGetProductReviewsData>>action,
input: createInput
});
