Auto Approve Sub Accounts - and a list of Memberships by ID

auto-approve-memberpress-new-user-approve.php

<?php
// allow for verification to be required for free trial users.
function mepr_newuser_approve_override($user_id) {
  $auto_approve = array(970688, 970684, 970687, 970686, 970685); //An array of product ID's to auto approve
  
  if(!class_exists('MeprOptions')) { return; }
  
  if(!isset($_POST['mepr_product_id']) && !isset($_POST['manage_sub_accounts_form'])) { return $user_id; } //Not a MemberPress signup?
  
  $product_id = isset($_POST['mepr_product_id'])?$_POST['mepr_product_id']:false;
  
  if(isset($_POST['manage_sub_accounts_form']) || ($product_id && in_array($product_id, $auto_approve))) {
    $_REQUEST['action'] = 'createuser';
  }
}
add_filter('user_register', 'mepr_newuser_approve_override', 8);

Edit the ID's in line #4 with the ID's of your Memberships that should be auto-approved.