show wp-template-part and wp-template-part-area in GraphQL

functions.php

add_filter( 'register_post_type_args', function( $args, $post_type ) {

	if ( 'wp_template_part' === $post_type ) {
		$args['show_in_graphql'] = true;
		$args['graphql_single_name'] = 'TemplatePart';
		$args['graphql_plural_name'] = 'TemplateParts';
	}

	return $args;

}, 10, 2 );

add_filter( 'register_taxonomy_args', function( $args, $taxonomy ) {

	if ( 'wp_template_part_area' === $taxonomy ) {
		$args['show_in_graphql'] = true;
		$args['graphql_single_name'] = 'TemplatePartArea';
		$args['graphql_plural_name'] = 'TemplatePartAreas';
	}

	return $args;

}, 10, 2 );