After looking into your screenshot the fields doesn't have the date control in order to choose the date in those fields, both looks like plain text fields. Could you share the design time configuration of these properties and elaborate what issues are you facing with screenshots.
i am not really sure what you want to achieve, it is like you are unable to see a date time calender, as mahesh mentioned you are using the correct control, please drag the below control in the section and implement it.
I have reviewed the document shared by you and it wasn't much informative. Also, I observed that calendar icon or drop down isn't available. So, please either provide runtime screenshots having one or provide more description about your business requirement.
For having Drop-down in Calendar:-
1. Add "DataTime" control in the section.
2. Click on Gear icon of the Date Time control to open "Cell Properties", go to Presentation Tab.