Our docs are here:
https://www.paidmembershipspro.com/add-ons/buddypress-integration/
When you edit a membership level, for the “unlock BuddyPress” settings, choose the “Yes – Give members access to specific features” option and it will show checkboxes for each BuddyPress module.
This should work. Make sure the general settings for non-members are locking down everything.