Short answer - you are responsible for submitting the completion cert for CPEs.
Long answer - I just had this question myself because I didn't read through the full Overview page. A second time through the overview of the course I completed revealed this paragraph:
CPE Reporting: You are responsible for submitting the CPEs through the CPE portal: https://cpe.isc2.org/s/. Upon completion of the course you will earn 5 Group A CPEs towards your (ISC)² credentials. Please make sure at the end of the course that you download and retain the certificate of completion as proof of credits earned.