Enqueueing scripts fro classic editor

There are a lot of WP actions and filters you can use depending on what exactly you need to do ??

Some are in edit-post-advanced.php, others are in the plugin. There is also a way to check if this plugin is activated and even what the current settings are. Have a look https://codex.www.ads-software.com/Plugin_API#Hooks:_Actions_and_Filters and https://github.com/WordPress/classic-editor.