When creating a profile field, on the right corner of the screen, you can select which specific profile type this profile field would be available. you may also select “Users with no profile type". To do this, please follow the steps below:

    1. Navigate to BuddyBoss dashboard - Profiles.

    2. Create new or edit existing fields. 

    3. On the right side of your screen, under the Profile Types section, select which profile type this field would be available to.

    4. Don't forget to click on the "Update" button to save the changes.

As an alternative, you may also set a conditional profile field with the following plugin: https://www.buddyboss.com/integrations/conditional-profile-fields-for-buddypress/

This can set conditions for the hiding/showing profile fields based on conditional logic.