How To Create Button in Divi Menu Bar

place this code on menu: <span class=”et_pb_more_button et_pb_button”>Sample Button</span>

then place this code in custom CSS:

#et-top-navigation .et_pb_button {
margin-top: 0px;
font-size: inherit;
font-weight: inherit;
}

#et-top-navigation .et_pb_button:after {
font-size: 23px;
}