block-allowlist.php

<?php

add_filter( 'allowed_block_types_all', $n( 'allowed_block_types_all' ) );

/**
 * Allowlist of blocks in the Gutenberg editor.
 *
 * @param array $allowed_blocks List of blocks that are allowed
 * @return array Allowed list of blocks
 */
function allowed_block_types_all( $allowed_blocks ) {
	return array(
		'core/image',
		'core/paragraph',
		'core/heading',
		'core/list',
		'core/buttons',

	);
}