Squarespace Footer Navigation

To add a Footer Navigation, you can use a Text Block. However in this post, I will guide you copy Navigation in Header and add it to Footer.
#1. First, edit Site Footer > Add a Code Block with this code

<div class="footer-navigation"></div>

#2. Use this code to Code Injection > Footer

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
	$('.header-display-desktop nav.header-nav-list').clone().appendTo('.footer-navigation');
});
</script>
<style>
div.footer-navigation .header-nav-folder-content {
    display: none;
}
div.footer-navigation div.header-nav-item {
    margin-left: 1vw;
    margin-right: 1vw;
}
div.footer-navigation {
    text-align: center;
}
  div.footer-navigation a {
  	opacity: 1 !important;
  }
</style>

#3. Result