Hi there!

Thanks for contacting us.

Here is the custom code to set parent menu item:

.offcanvas-menu .offcanvas-inner ul.menu>li>a, .offcanvas-menu .offcanvas-inner ul.menu>li>span {
    font-size: 20px;
    line-height: 18px;
}

And here is the custom code to set child menu item:
.offcanvas-menu .offcanvas-inner ul.menu>li>ul li a {
    font-size: 16px;
    line-height: 20px;
}

.offcanvas-menu .offcanvas-inner ul.menu>li>a, .offcanvas-menu .offcanvas-inner ul.menu>li>span { font-size: 20px; line-height: 18px; }

.offcanvas-menu .offcanvas-inner ul.menu>li>ul li a { font-size: 15px; line-height: 18px; }lease put these code in your custom.css file. You can change pixel values as per your need. Hope this helps!

Best Regards

Thank you, works fine on desktop, mobile Edge and mobile Safari