You can use Archive.org and the Wayback Machine to find older editions of websites saved in their public collection.
Search the Wayback Machine box on the Archive.org page.

The results will let you navigate by date, and select a version of the site saved at some time in the past.

While this public collection is incredibly useful, it does have limitations.
This can be made easier by using one of the Internet Archive's browser extensions or apps. These can be found at https://web.archive.org/.
As of March 2023, downloads are available for Chrome, Safari, Firefox, Edge, iOS, and Android.