wp_register_sitemap_provider()

wp_register_sitemap_provider( string $name, WP_Sitemaps_Provider $provider ): bool

function wp_register_sitemap_provider( $name, WP_Sitemaps_Provider $provider ) {
	$sitemaps = wp_sitemaps_get_server();

	return $sitemaps->registry->add_provider( $name, $provider );
}