I googled "moodle bulk enrol" and got to https://docs.moodle.org/35/en/Bulk_enrolments. It does say "Type: local plugin" in the uinfo box, but I only noticed if after googling for "moodle bulk enrol option missing" and found this thread.
Enrolment
Unable to bulk enroll students
Denne diskusjonen har blitt stengt, og du kan derfor ikke svare i den lengre.