To make it so that you can change the settings is by using

setTimeout(() => { // timeout is important
   $(".menu-item-list").each(function() {
      let instance = Sortable.get(this); // Get existing Sortable instance
      if (instance) {
         // Apply the updated filter setting
         instance.option("multiDrag", true);
         instance.option("selectedClass", "selected");
         instance.option("fallbackTolerance", 3);
      }
   });
}, 500);