You could try use the set attribute widget from the AppStore
https://appstore.home.mendix.com/link/app/5958/
and use that to set the input type for this datepicker to
type="datetime-local"
or
type="date"
because i think this should give you control over how iOS handles the date input.
but yeah, the date picker / time picker in the Mendix modeler is still one of the biggest abominations