Changing the hub tab titles globally

In your Gauge child theme functions.php file add:

function ghostpool_new_tab_titles( $title, $hub_id ) {
    if ( get_post_meta( $hub_id, '_wp_page_template', true ) === 'review-template.php' ) {
        $title = 'New Title';
    } elseif ( get_post_meta( $hub_id, '_wp_page_template', true ) === 'news-template.php' ) {
        $title = 'New Title';
    } elseif ( get_post_meta( $hub_id, '_wp_page_template', true ) === 'images-template.php' ) {
        $title = 'New Title';
    } elseif ( get_post_meta( $hub_id, '_wp_page_template', true ) === 'videos-template.php' ) {
        $title = 'New Title';
    } elseif ( get_post_meta( $hub_id, '_wp_page_template', true ) === 'write-a-review-template.php' ) {
        $title = 'New Title';
    } elseif ( get_post_meta( $hub_id, '_wp_page_template', true ) === 'user-reviews-template.php' ) {
        $title = 'New Title';
    }
    return $title;
    
}
add_filter( 'ghostpool_hub_tab_title', 'ghostpool_new_tab_titles', 10, 2 );

Replace each occurrence of "New Title" with the title you want for that tab.