Hello,

Please add this code to the Theme Settings > Custom CSS > Mobile:

body .search-button .search-button-icon:after {
    left: 60%;
}

Please enter the shop page and find the option to set the light color of the title https://prnt.sc/p6xc7r

In Mobile Cart Quantity missing It is not a bug. Mobile button navbar does not have quantity for the cart.

Best Regards