I saw your response about not blocking ads currently.
What about blocking adult content, for a child's computer? Mullvad had such an option[1] under family.dns.mullvad.net. Very useful!
[1]https://mullvad.net/en/help/dns-over-https-and-dns-over-tls
[1]https://mullvad.net/en/help/dns-over-https-and-dns-over-tls
In the near term, there is no filter set that we offer that mimics that functionality.
However, we recognize some variation of "best effort" adult content segmentation is a useful filter to have. We're considering it in the near term, as we have some specific educational institutional pressure to try to meet as well, since students are often easy targets for phishing, classroom computers are rife with malware, and there is also the problem of inappropriate DNS-based profiling of students and schools - problems that Quad9 can help solve.