WordPress whitelist Gutenberg blocks

block-whitelist.php

<?php

/**
 * Block whitelist
 * Only allow certain blocks to be used
 */

add_filter( 'allowed_block_types', 'our_allowed_block_types' );
 
function our_allowed_block_types( $allowed_blocks ) {
 
	return array(
		'core/image',
		'core/paragraph',
		'core/heading',
		'core/list',
		'core/media-text',
		'core/quote',
		'core/group',
		'core/button',
		'acf/hero',
		'acf/utility',
		'acf/testimonials'
	);
 
}