I’ve been trying for yonks (>two full days, plus crashing HA along the way) to get duckdns to work on my home assistant, so that I can remote access it from my telephone. Without success. There are pages and pages of people trying to get it to work, with multiple suggestions, mostly without success. I then came across Tailscale, it took me all of ten minutes to set it up, and WORKING. Whow, so hope this helps anybody trying to get remote access to their home assistant. This is not a publicity for Tailscale or Duckdns, just I’m so pleased to get it finally working.
IDK man. I set up DuckDNS 2 years ago and since then I had to update HomeAssistant settings just once when they introduced public address in settings. No failures, no problems. Rest is done automatically and my alert for expiring certificate never triggered.
I’m happy that you found solution with Tailscale but DuckDNS is also good and reliable in my experience.