xprofile_get_field_visibility_level( int $field_id, int $user_id )

function xprofile_get_field_visibility_level( $field_id = 0, $user_id = 0 ) {
	$current_level = '';

	if ( empty( $field_id ) || empty( $user_id ) ) {
		return $current_level;
	}

	$current_levels = bp_get_user_meta( $user_id, 'bp_xprofile_visibility_levels', true );
	$current_level  = isset( $current_levels[ $field_id ] ) ? $current_levels[ $field_id ] : '';

	// Use the user's stored level, unless custom visibility is disabled.
	$field = xprofile_get_field( $field_id );
	if ( isset( $field->allow_custom_visibility ) && 'disabled' === $field->allow_custom_visibility ) {
		$current_level = $field->default_visibility;
	}

	// If we're still empty, it means that overrides are permitted, but the
	// user has not provided a value. Use the default value.
	if ( empty( $current_level ) ) {
		$current_level = $field->default_visibility;
	}

	return $current_level;
}