Protect entire singular.php template with Passster and password lists.

singular.php

<?php
echo do_shortcode( '[passster password_list="115"]' );

$atts  = array( 'password_list' => '115' );
$valid = passster\PS_Conditional::is_valid( $atts );

if ( $valid ) {
  get_template_part( 'template-parts/content', get_post_type() );
  // You can also use any other template of ACF layout here.
}