It’s available now! In my test with Mullvad app, it doesn’t work. Mullvad’s DNS takes precedence. But it works flawless with Wireguard app instead. So, that’s what I am using, with Mullvad-generated config.
With that news, I updated my iPad to iOS 14 public beta 2. This is my first time running a beta build. Going by Twitter, this beta is stable.
I also reached out to NextDNS devs on their Intercom, to know more about this build. They let me know that it’d be announced on their reddit, when Apple approves it.