Hi@Kumar902402,
Based on the issue that you mentioned, do you want to format the date as "dd/mm/yyyy"?
Could you please share a bit more about the scenario:
- Is this related date column a DateTime type in the SP list?
- How you format the Date in your Label?
I assume that it is a DateTime column in your SP list. And @WarrenBelz has provided a correct direction, you could take a try. If this could work, please mark @WarrenBelz 's solution as an answer to help other users to find it easily.
Combine that with your description, there is something wrong when you display DatePicker selected date in the Label.
I have a test to reproduce your issue when you put the following formula within the Text property of the corresponding Label, the date will display as "mm/dd/yyyy":

So please modify to set the Text property of the corresponding Label within the Gallery as below:
Text(DatePicker2.SelectedDate,"[$-en-US]dd/mm/yyyy")

If your problem is still, please share more details about the above questions.
Best Regards,
Qi