WP_Sitemaps_Taxonomies::get_object_subtypes()

	public function get_object_subtypes() {
		$taxonomies = get_taxonomies( array( 'public' => true ), 'objects' );

		$taxonomies = array_filter( $taxonomies, 'is_taxonomy_viewable' );

		/**
		 * Filters the list of taxonomy object subtypes available within the sitemap.
		 *
		 * @since 5.5.0
		 *
		 * @param WP_Taxonomy[] $taxonomies Array of registered taxonomy objects keyed by their name.
		 */
		return apply_filters( 'wp_sitemaps_taxonomies', $taxonomies );
	}