An easy way to know the current actual setting on the server is adding
<?php echo ini_get(‘max_input_vars’); ?>
please add it to footer.php
right before the </body> closing tag
view any front end page, which will show the value on at the bottom of the page.
It’s possible that the value in your php.ini is overridden by another php.ini file with higher priority.
You can confirm this with your hosting providers telling them which file you edited.