Shameless plug: DoH configuration profiles for several more DNS providers can be found here: https://gitlab.com/nitrohorse/ios14-encrypted-dns-mobileconf...

Same for android https://blog.cloudflare.com/enable-private-dns-with-1-1-1-1-...

As did Windows (I saw this as I read over the last six months of changelogs a few days ago)... so why exactly is this a thing Firefox is doing again? :/