WP Remote - WP Remote provides a single place to monitor and update all of your WordPress sites.
WP User Manager - The most customizable profiles, community builder and membership WordPress plugin
InfiniteWP - Manage unlimited https://alternativeto.net/software/wordpress/ sites from a central admin panel.
Project Panorama - Project Panorama is an elegant and reliable WordPress manager plugin that comes with exciting features and tools that will allow managing your multiple WordPress sites with ease.
MainWP - A Free, Open-source, & Self-hosted one-stop solution to manage Unlimited WordPress websites from a single dashboard. MainWP is the only management plugin with 2000+ ⭐⭐⭐⭐⭐ reviews on WP.org
Jetpack - Jetpack offers SEO and security plugins for Wordpress.