I wonder if the router manufacturer could just have the router connect to a Dynamic DNS provider, register the router’s current IPv6 address (so we don’t have t

I wonder if the router manufacturer could just have the router connect to a Dynamic DNS provider, register the router’s current IPv6 address (so we don’t have to worry about NAT from a evil modem), and get a Let’s Encrypt cert over ACME. Synology does something like this if you open the right ports for your NAS. Every IoT device doing this might be annoying for Let’s Encrypt, but routers I think are worth it considering they stand guard for the rest of the home network.