Hi Bob
We have checked your requirement with Xamarin.Forms.iOS and Xamarin.Forms.Android data form scrolling behavior when added DataForm in Stack panel. As per implementation of Dataform for both platforms, DataForm is added in respective frame work ScrollViewer .
In Xamarin.Forms.iOS DataForm item’s get scrolled, since available size assigned from parent StackLayout is lesser than added elements and item will be displayed only in ViewPort height of scrollviewer. If you want to restrict the behavior of scrolling you can increase the SfDataForm HeightRequest to achieve your requirement.
Please let us know if you need further assistance.
Regards,
Swathi G