Are you sure you need DYNDNS? My 'dynamic' IP address changes so rarely that I just update my DNS entries manually when it does.

Could you elaborate on the "non-spying" bit? There's not much they can infer from people looking up your IP. Unless you run their daemon that updates the IP, as opposed to curl in cron.

Domains registered at OVH include this (and 100mb webspace + one 5gb email address) for free.

Most registrars also run DNS servers as part of the fee you pay for the domain. Usually they have an API. You can just use that to implement Dynamic DNS, there are even often tools for it. Do a search for your DNS registrar and dyndns.

Afraid.org is better than DuckDNS. (DuckDNS is not reliable and have been slow or down a lot.)

But it is still American.

I'm not sure what you mean by non-spying, but you should be prepared for anything you put on the Internet to be poked by any number of people that you do not want poking. If whatever you are hosting would be compromised by having a DNS name, you might want to rethink your security plan.

Pretty sure you'd be better of with a tunnel like Cloudflare Tunnels, Tailscale, or something similar. They couldn't care less if your ip address changes. Of course Cloudflare is a big corp and doesn't fit your bill but it's the idea I mean not the corp and it is probably the most well known

I use caddy v2 reverse proxy to automatically change the DNS records on my domain, I recommend you try that as well.

You might try DNS4EU: 86.54.11.1 86.54.11.201 DoH: https://protective.joindns4.eu/dns-query DoT: protective.joindns4.eu