While there is merit to your post, I will point out the obvious: your post is hosted on an instance named “lemmy world” and you are citing US enforcement codes and sections, but lemmy.world (the servers) do not reside inside the United States. Lemmy.world (the server) would be subject to the laws of the country in which it is hosted, the admin team would be subjected to the laws in the countries in which they reside, the community moderators would be subject to the laws in the countries they reside, and the lemmy.world users would be subject to the laws frrom where ever they reside.
So, you can’t simply link to a writeup about some US regulations and assume it’s going to be exactly the same everywhere and for everyone.
Are you just talking about dynamic DNS services for one or a few home servers?
There’s always DynDNS, but that’s a paid service. I actually discovered that dynamic IP address service was provided free by Google when using Google Domains as the registrar, so I moved a few of my private domains over to Google several years ago to save myself $55 a year.
Unfortunately, Google Domains is shutting down and all registrar services and existing customer domains are getting moved to squarespace and I’ve not yet been able to determine if squarespace is going to be offering the free dynamic DNS service or not.