You should see the module at the very bottom of the list, as an available option to install. Be sure that your unzipped folder is not also nested in another folder. For example, if you open modules/Reporting, you should see a list of files, rather than another folder.
It’s not easily done, as having the action in your system will potentially break later versions where the updater attempts to add an action with the same name. For now, the best bet would be to use the student note workflow, or to update to v20 (or v21, releasing January 20th, 2021).