I think he's just talking about using Mullvad's [DNS servers](https://mullvad.net/en/help/dns-over-https-and-dns-over-tls https://mullvad.net/en/help/dns-over-h

I think he's just talking about using Mullvad's [DNS servers](https://mullvad.net/en/help/dns-over-https-and-dns-over-tls https://mullvad.net/en/help/dns-over-https-and-dns-over-tls), which work in most cases.