PMPro Approvals: If a user was approved for any other level, consider them approved for every level.

my_approve_user_if_already_approved.php

<?php
/**
 * If a user was approved for any other level, consider them approved for every level.
 * Requires the PMPro Approval Process for Membership Add On - https://www.paidmembershipspro.com/add-ons/approval-process-membership/
 * Must be using PMPro Approvals version 1.4.2 or higher.
 * Add this code to your site following this guide - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_approve_user_if_already_approved( $approved, $user_id, $level_id, $user_approval ) {

	// Already approved?
	if ( $approved ) {
		return $approved;
	}

	// Check if this level requires approval.
	if ( ! PMPro_Approvals::requiresApproval( $level_id ) ) {
		return $approved;
	}

	// Okay, check their approval log.
	$approval_log = get_user_meta( $user_id, 'pmpro_approval_log', true );
	if ( is_array( $approval_log) && ! empty( $approval_log ) ) {		
		$last_entry = end( $approval_log );
		if ( strpos( $last_entry, 'approved' ) !== false ) {
			// Previously approved.
			$approved = false;
		}
	}

	return $approved;
}
add_action( 'pmproap_user_is_approved', 'my_approve_user_if_already_approved', 10, 4 );