Set specific user fields to only show for some levels. This can be used to make individual fields level specific if the fields were created via settings in a field group that displays for all levels.

my-pmpro-change-user-fields-to-level-only.php

<?php
/**
 * Change user fields to level only.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_change_user_fields_to_level_only( $field, $where ) {
	// What fields do we want to change?
	$level_specific_fields = array( 'field_name_1', 'field_name_2', 'checkbox_group_example' ); // Add your field names here.

	// What levels should be able to see these fields?
	$levels = array( 2, 3 ); // Add your level IDs here.

	// Is this a level specific field?
	if ( in_array( $field->name, $level_specific_fields, true ) && ! empty( $levels ) && is_array( $levels ) ) {
		// Set levels attribute to only display in the user profile.
		$field->levels = $levels;
	}

	return $field;
}
add_filter( 'pmpro_add_user_field', 'my_pmpro_change_user_fields_to_level_only', 10, 2 );