I’ve used a number of the code examples from Blupry and I’ve found them to be really helpful. I have not yet tried the date picker they have in my projects but I’m sure it will work well - they did some development work on a calendar app for me and their support was exceptional. If you can’t find what you want natively from FlutterFlow, give some of the Blupry examples a try.
https://community.flutterflow.io/general-wishlist/post/more-flexible-date-pickers-and-calendar-widgets-K3Vrj4NWcJDUAA4?highlight=9xYUQoca22EIkQE