Mobile menu icon disappeared | WordPress.org

Hi Robin,

I’m using a Sydney Child theme – the main them is at 2.17 (I think a recent theme update may have broken it!)

I can verify that main theme update doesn’t break your child theme. But, you would need to make some adjustments with your child theme to be able to use latest code that theme’s newer version has.

Upon checking with my web browser’s inspector, you can show mobile menu with CSS code below:

.btn-menu {
  font-size: 28px;
  font-family: "FontAwesome";
  color: #000;
  float: block !important;
}
.btn-menu:before{
  content: "\f0c9";
  color: #fff;
}

To apply it to your site, add it to Additional CSS that is located under Appearance menu > Customize.