Chunk WP_Query to get all posts

chunk-wp-query.php

<?php
$found_posts    = true; // Set as true
$offset         = 0;    // Set start post
$posts_per_page = 20;   // Chunk for each 20 posts

while($found_posts) :
  $query  = new WP_Query([
      'posts_per_page'  => $posts_per_page,
      'offset'          => $offset
  ]);
  
  if($query->have_posts()) :
    // DO WHAT?
  else :
    $found_posts  = false;
  endif;
endwhile;