I just had the same problem, in your child themes functions.php file, find the bit that looks something like this:
wp_enqueue_script( ‘bootstrap5-childtheme’, get_stylesheet_directory_uri() . “/js/bootstrap.bundle.min.js#asyncload”, array(), null, true );
change it to this:
wp_enqueue_script( ‘bootstrap5-childtheme’, get_stylesheet_directory_uri() . “/js/bootstrap.bundle.min.js”, array(), null, array(‘in_footer’ => true, ‘strategy’ => ‘async’) );
I agree, the option to display the checkbox either ‘checked’ or ‘unchecked’ by default would be very useful.