Quick and dirty proof of concept for enabling sidebar area on pages that use Divi Builder

divi-mod-example.php

<?php

function et_pb_is_pagebuilder_used( $page_id ) {
	return false;
}

add_action( 'admin_head', 'add_my_admin_styles' );
function add_my_admin_styles() {
	echo '<style>.et_pb_page_layout_settings { display: block!important;}</style>';
}