It’s a old problem with Buddypress that admin profile visible publically on the website front end . Most of the time website admin used to rename the admin account. This is not the real solution to hide the admin account on the website.
So if you like to hide the admin account completely from BuddyPress website , you need to edit the function.php(Inside your theme folder) file in your wordpress.
Put these code on fuction.php and your admin profile will not visible anymore on front end of the website.
//list of users to exclude
$excluded_user=’1,2,3′;//comma separated ids of users whom you want to exclude
if($object!=’members’)//hide for members only
//check if we are searching for friends list etc?, do not exclude in this case
That’s it ! Now your admin profile will not visible on Buddypress Front End.