Understanding NAT 64 on Macs

Application review by Apple required IPv6 support.
To address this, we are configuring NAT 64 and verifying its operation.
However, in Apple's environment, it is not allowed.
Therefore, I would like to check if there are any problems with the following correspondence.

What to do

·Update MacOS to target OS
·Response to sharing a wired LAN Mac with the instructed settings.
Wi-Fi settings, check
Create NAT 64 Network
Remove all other Wi-Fi access settings
·Set iPhone (9.3.2) to access in that environment
·Check the network environment on the iPhone and make sure DNS is IPv6 address (2001:~)
·I contacted Apple about the settings, but they sent me a link to the settings, and I asked them a question with detailed instructions, but after a week, they still haven't answered me

Confirmation

·Verify that you have contacted DNS via IPv6 on the packet monitor before and after setting up the settings
·Verify Internet connection

I'm in a lot of trouble because I'm blocked in all directions.
Sorry for the inconvenience.

Related Links
Supporting IPv6 DNS64/NAT64 Networks

Related Questions
About IPv6 support for ios apps