The picker control allows you to pick an item among a list of items that can be customized with custom view. This control can be opened as dialog. Its rich feature set includes functionalities such as data binding, multi column, header/footer, custom view on header/footer, and default validation buttons.
For know more details about Picker: https://www.syncfusion.com/xamarin-ui-controls/xamarin-picker
Picker user guide documentation: https://help.syncfusion.com/xamarin/picker/gettingstarted