.dropdown-submenu {
    position: relative;
  }
  
  .dropdown-submenu>a:after {
    content: "\f0da";
    float: right;
    border: none;
    font-family: 'Font Awesome 5 Pro';
    display:inline-block !important;
    font-weight: bold;
  }
  
  .dropdown-submenu>.dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: 0px;
    margin-left: 0px;
  }