Hi @RameshMukka ,
Do you mean that the Date Picker control does not work as expected in your canvas app?
Based on the issue that you mentioned, I have made a test on my side, and don't have the issue that you mentioned. The Date Picker control generated from Date time field in my SP List works well:

Please consider add a new Date Picker control in your canvas app, then check if the issue still exists. If not, as an fixed solution, please unlock the Schedule field data card in your Edit form, then remove the original Date Picker control from it, instead, add a new Date Picker control inside it, then re-bind the new Date Picker control with the Update property of the Schedule field data card.
Set the Update property of the Schedule field data card to following:
DatePicker1.SelectedDate + Time(Value(HourValue1.Selected.Value), Value(MinuteValue1.Selected.Value), 0)
Set the DefaultDate property of the new added DatePicker control to following:
Parent.Default
Please consider take a try with above solution, then check if the issue is solved.
Best regards,