Conditionally including JS based on whether ACF field is set [closed]

The Loop isn’t available yet in wp_enqueue_scripts, so is_single() etc pp aren’t going to work.
However, the queried object has already been determined, so you could use something like

add_action("wp_enqueue_scripts", function() {
    $qo = get_queried_object();
    if(get_class($qo) == "WP_Post") {
        if($val = get_field("my-field", $qo->ID)) {
            wp_enqueue_script("jquery");
        }
    }
});