Hi librandi,
You can add a Custom Module with the header-r position and add the following code to the module:
<p><a class="btn btn-outline-primary" title="" href="index.php?Itemid=176"> <span class="d-none d-xl-inline">Diversity & Inclusion</span> <span class="d-inline d-xl-none">D&I</span> </a></p>
