Search custom type post

Question

I want to make my search bar on the website show custom post type (courses) beside the blog posts.

I tried these codes But it did not work. The only thing that worked was the WP Extended Search plugin, but I want to do it by code.

function tg_include_custom_post_types_in_search_results( $query ) {
    if ( $query->is_main_query() && $query->is_search() && ! is_admin() ) {
        $query->set( 'post_type', array( 'post', 'courses') );
    }
}
add_action( 'pre_get_posts', 'tg_include_custom_post_types_in_search_results' );

and this

function include_cpt_search( $query ) {
    
    if ( $query->is_search ) {
        $query->set( 'post_type', array( 'post', 'courses', 'custom_post_type' ) );
    }
    
    return $query;
    
}
add_filter( 'pre_get_posts', 'include_cpt_search' ); 

Please advise. Thank you.