Install
Upload it under Plugins → Add New Plugin → Upload Plugin, then activate.
Install straight from GitHub with WP-CLI:
wp plugin install https://github.com/xxsimoxx/two-factor-light/releases/download/0.1.1/two-factor-light-0.1.1.zipNo built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
This is a fork of Two Factor v. 0.15.0 by WordPress.org that works in ClassicPress.
It supports only Email and Backup codes, but can be extended to use WebAuthn using WebAuthn Provider for Two Factor by Volodymyr Kolesnykov.
Use it at your own risk.
Releases
2 releases. Each count is every asset in that release; expand a row for the breakdown.