Comment by squaresmile

If self-host is your thing, there are blocky [0] or Adguard Home [1].

I self-host DOH using blocky so my Android devices can use it via "Private DNS" that is active on both wifi and cellular.

[0] https://0xerr0r.github.io/blocky/latest/

[1] https://github.com/AdguardTeam/AdGuardHome

[2] https://adguard-dns.io/en/public-dns.html how to configure