Excludarr manages your libraries in Radarr/Sonarr. It keeps track of your library and checks if your movies and series are also available on a configured streaming provider. It can exclude the movies and series that are available on a configured streaming provider. But it can also re-add movies and series if they are not streaming anymore.
Why do you think that https://github.com/mdhiggins/sickbeard_mp4_automator is a good alternative to excludarr