Within your target Moodle, go to the course and from the course navigation menu, go to More, unroll the menu, and first select Remote Restore, then select the source Moodle and the course that you want to import. Please note that the teacher must be enrolled in both the source and the target course.
Check the box in the section name and activities that you need to reuse and restore in the new course.
As a teacher, the content you restore will be merged with the target course content, excluding user data.