Improve the Recurring Booking function and default dates without JS

I want to have the ability within PowerApps to edit the behaviour of the default Recurring Booking Start and End Dates and Times I want to set the default date to be today's date I want to set the default time to be 8am so you don't have to always scroll the time from 00:00 through the hours I want the "To" date to be updated to be greater than the "From" date like when you go online and book an airline ticket, the "To" date is automatically updated to be greater than the start date. This should be easy to implement. I want to be able to select from different Date/Time themed pickers. Other modern programs have the ability to select a variation of themes for the date/time selection Also do this for any date/time selector field in the whole of Dynamics not just Field Service Please!