Menu not showing in mobile

Hi there!

Thanks for contacting us.

Please use the following code in your custom CSS to change the offcanvas menu icon and the overlay background color to make them visible:

.burger-icon>span {
    background-color: black;
}
.offcanvas-overlay {
    background: white;
}

Note: Path towards custom CSS(Joomla 3): Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.

Best Regards