Please note that we have a setting that will hide the Author and Date found on a LearnDash Course on your website. Navigate to the BuddyBoss Dashboard - Theme Options - LearnDash tab. On that page, scroll down and look for Course Content. You can disable Course Author and Course Date for the Author and Date not to show on the LearnDash Course. 

Setting Screenshot:

With Author and Date Screenshot:

Without the Author and Date Screenshot: