Accessing the Posts page Content

So you can fetch the id using a get_option call, then access the data from there.

$page_for_posts = get_option( 'page_for_posts' );  
$page_data = get_page( $page_for_posts )  ;

Then you can access the properties like this:

<?= get_the_post_thumbnail($page_data->ID) ?>
<h1><?= $page_data->post_title ?></h1>
<?= $page_data->post_content ?>