By default, we do not have this option. You can use the following jQuery function code. Please see the steps below:

Note: Make sure to have a complete site backup before proceeding

    1. Go to Appearance - Theme Editor.

    2. Under Select theme to edit, choose (BuddyBoss Child/whatever theme is active), then click Select.

    3. Below Theme Files, select Theme Functions (functions.php).

    4. Append the code just before the closing PHP tag “?>”:

function hide_lifterlms_lessons_list_sidebar() {
    if ( ! current_user_can( 'administrator' ) ) {
        ?>
        <script type="text/javascript">
            jQuery(document).ready(function($) {
                $('.lifter-topic-sidebar-wrapper .lifterlms-lessions-list').hide();
            });
        </script>
        <?php
    }
}
add_action( 'wp_footer', 'hide_lifterlms_lessons_list_sidebar' );

    5. Click Update File to save the changes.

Note: Any modifications are considered as custom work already. Know more about our Support Policy here: https://www.buddyboss.com/support-policy/

Screenshot: