In advanced forms, we can create a Field Group, but we can't duplicate the group to quickly add repeatable sections of a form.
This would be a useful tool where we have quite a number of grouped fields that we need to re-use. E.g. Family member data collection - we collect 16 pieces of information on a person's family member. To add another family member we need to build out that entire section again, will all 16 fields. If it could be grouped and duplicated, that would be much faster and easier to manage.
Note that the pre-built 'Address' form field is effectively a Field Group with preset form fields and can be duplicated. So, we're asking for the ability to build out a custom field group and then be able to duplicate it.
Hope this can be considered and is useful for other users too :)