Blocks on templates

/**

 * Setting Hero Block on Pages by default.

 *

 */

function awesome_register_page_template() {

	$post_type_object = get_post_type_object( 'page' );

	$post_type_object->template = array(

		array( 'core/pattern', array(

			'slug' => 'frost/hero',

		) ),

	);

}

add_action( 'init', 'awesome_register_page_template' );