Since Moodle 4.4 some course activity editing global functions have been moved to format actions (core_courseformat/cmactions). However, many are still in course/lib.php and should be moved.

Some of the functions to migrate are:

• 
  duplicate_module
• course_delete_module
• 
  moveto_module
• set_coursemodule_visible (and extract the stealth logic to another method)

• set_coursemodule_groupmode
   

This issue also includes adding deprecation messages to the global functions. However, if for some reason that was not possible, it can wait until MDL-80482.