WP_Query: how to search tags in addition to a custom post type?

Below is what I have so far for a custom rest endpoint (‘placesdb/v1/search?term=’) for a custom post type (place). This successfully returns all the places that have the search term in the title or content. However, I also want to return all the tags (tag archive pages) that match the search term (the same result as calling the non-custom ‘/wp/v2/tags?search=’). Is it possible to somehow add the tag results to the place results? I already successfully did the front-end approach of calling the places and tags endpoints separately via ajax, but I would rather get all the data in one swoop. Hence my attempt at making this custom endpoint.

function placesSearch() {   register_rest_route('placesdb/v1', 'search', array(     'methods' => WP_REST_SERVER::READABLE,     'callback' => 'placesSearchResults'   )); } function placesSearchResults($  data) {   $  places = new WP_Query(array(     'post_type' => array('place'),     's' => sanitize_text_field($  data['term'])   ));    $  placesResults = array();    while($  places->have_posts()) {     $  places->the_post();     array_push($  placesResults, array(       'title' => get_the_title(),       'permalink' => get_the_permalink()     ));   }    return $  placesResults; } add_action('rest_api_init', 'placesSearch');