Ícono que no aparecía en modo movil android celular nav user

<button class="pull-right visible-xs dk" ui-toggle-class="show" target=".navbar-collapse">

            <i class="fa-solid fa-user" class="glyphicon glyphicon-cog"></i>

        </button>

        <button class="pull-right visible-xs" ui-toggle-class="off-screen" target=".app-aside" ui-scroll="app">

            <i class="fa-solid fa-bars" class="glyphicon glyphicon-align-justify"></i>

        </button>