Block public DNS like google and other malware dns
Anyway to block the public DNS other than nextdns ? My iPhone is swapped by google DNS and seems to be spying on me?
In Parental Control -
Block Bypass Methods
Prevent or hinder the use of methods that can help bypass NextDNS filtering on the network. This includes VPNs, proxies, Tor-related software and encrypted DNS providers.
But I think you chose the worst solution adding only the IPv4 DNS if I see it right and you might have leaks on IPv6.
Look at Setup - Setup Guide - Select iOS and read.
I don't know how it is on iOS or what version you have but if you can, use DNS-over-HTTPS or DNS-over-TLS
You said you are using the app. Is it enabled and configured like it says in Setup guide?
All you showed was this,
Google can't magically enter your phone.
Even on Android I can block anything from Google. With a firewall you can monitor all the connections.