The default value is not working properly if only changing the country code from default to something else and remain the Phone number field as it is. If we provide both the values Country code, Phone number then the default value is getting updated. But I want to set default country code in this case its not updating the default value with the country code we are providing.
NOTE: If we are only updating the country code for this field from Manage form display its changing the default value in the field edit page (/admin/structure/types/manage/{bundle_name}/fields/node.{bundle_name}.{field_machine_name}). So I think it should update the default value from the field edit page also.
Attached a screenshot -
Closed: works as designed
2.0
Code
This is expected behavior. Default value on the field edit page expects both country and phone number to be populated. If you only want to set default country, you should use form display setting.