BuddyPress Moderation Pro provides a feature to block the members. To enable this feature, you’ll have to navigate wb Plugins >> BP Moderation Pro >> Members >> Block members, and enable the setting.

Once the setting is enabled users can block each other.

Users can see their blocked members list from their profiles only. Navigate to the profile > settings > blocked members. For unblocking the members, they can just click on unblock button.

Update on August 30, 2023