I recently posted a query regarding replacing the default date picker so that the user didn't have to click the OK button:
https://powerusers.microsoft.com/t5/Building-Power-Apps/Date-picker-custom-control-query/m-p/1379549#M358765
The solution I was provided was based upon copying the datepicker from PowerApps in Teams to regular Power Apps, and for the most part works fine. I just have one glitch.
In my part of the world we use the dd/mm/yyyy date format. When I preview the app in Power Apps Studio, the date picker displays the date in the correct format:

However, when I publish the app, it changes it to US date format (mm/dd/yyyy):

Any ideas how I can fix this?