Supporting IPV6, will give us implicit support to IPV4 or we need to support explicitly IPV4, if we are using APIs for IPV6?
https://developer.apple.com/documentation/networkextension/neipv6route?language=objc
From the above link :
A convenience method for creating the default IPv4 route.
https://developer.apple.com/documentation/networkextension/neipv4settings?language=objc
Its not clear from the documentation IPV6 API has fallback mechanism to support IPV4 or not.