Prepend post type label to title for native main search

searchwp-customizations.php

<?php
// Prepend post type label to title for native main search
add_filter( 'the_title', function( $title, $post_id ) {
    if ( in_the_loop() && ( is_search() || isset( $_REQUEST['swps'] ) ) ) {
        $post_type_obj = get_post_type_object( get_post_type( $post_id ) );
        if ( $post_type_obj && ! empty( $post_type_obj->labels->singular_name ) ) {
            $label = esc_html( $post_type_obj->labels->singular_name );
            $title = sprintf( '<span class="search-post-type">%s:</span> %s', $label, $title );
        }
    }
    return $title;
}, 10, 2 );