Hello,
01. Sorry but there is no option in Theme Settings available for that.
It requires customizations and this is beyond our limitations and support policy.
02. You can configure the mobile bottom navbar in the Theme Settings > General > Mobile bottom navbar.
You can add and remove buttons, add your custom button and icon.
For the mobile menu icon. This can be implemented with Font Awesome icons. Please make sure that Font Awesome Library >> Set it to always use from Theme Settings > performance > font and icons. add this code to the Theme Settings > Custom CSS > Custom CSS for mobile:
.wd-header-mobile-nav .wd-tools-icon:before {
width:30px;
height:30px;
background-position:center center;
background-size:contain;
background-repeat:no-repeat;
font-family: "Font Awesome 5 Free";
font-weight: 900;
content: "\f067";
}
Best Regards.