Support datetime_range (date and time) fields

Goal

Allow to map two webform date (time) fields to a datetime_range field.

Details

Webform does not support daterange fields: #3009723: Date Range element with support for present so we need to use two date (time fields). My particular use case is date+time range field. In #3058868-4: Add other field types you mentioned daterange fields, so I'm aware that this is not necessarily a "no-brainer". Maybe there could be a workaround using tokens or expand the custom textfield to use twig?