Download older version of Premiere Pro for incompatible mac

I'm trying to download Premiere Pro for a school project, but my iMac (late 2013) is too outdated for the current version of Premiere Pro.

For some reason, it's also locked me out of installing previous versions; the option isn't in the dropdown menu where it is for other apps (see the attached photo). Is there another way I can download an older version of Premiere Pro (preferably 2023)?