Force remove parent theme CSS/JS and call them from Child theme

As far as i know the handle of the stylesheet will be the ID given to the element in the markup. If you can’t find the enqueue function in the mothertheme you can inspect the site to find it.

If you have the ID you can use :

add_action('wp_footer', function() {
   wp_dequeue_style('the_id_of_the_stylesheet');
});