Listing on the SM site has both "PHP 8.0""PHP 7.3" tags when it should only have one. Need to clarify.
The 2.0 version supports SMF 2.0 and PHP 7.3. The 2.1 version supports SMF 2.1 and PHP 8.0+. I intend to remove the 2.0 version from the customize site in the future.