.select2-results__option .wrap:before {
  font-family: "Font Awesome 5 Free";
  color: #999;
  content: "\f0c8";
  width: 25px;
  height: 25px;
  padding-right: 10px;
}
.select2-results__option[aria-selected="true"] .wrap:before {
  content: "\f14a";
}
.select2-results__option--selected .wrap:before {
  content: "\f14a";
}