You should use archive.org or archive.today links.

The best way to influence the Domain Authority metric is to improve your site’s overall SEO health, with a particular focus on the quality and quantity of external links pointing to your site.

You can use the Wayback machine addon to easily get archived links https://addons.mozilla.org/en-US/firefox/addon/wayback-machine_new/.

And a bookmarklet for archive.today:

javascript:void(open('https://archive.today/?run=1&url='+encodeURIComponent(document.location)))
  • unalivejoy@lemm.eeEnglish
    0·
    3 days ago

    Lemmy adds a rel="canonical" link to every post. Google should be able to understand that and make every page with the same canonical link go to the same page. I think other sites who have many domains with the same content, like medium, do the same thing.