Checkout Extensibility Issue - Cart Breadcrumb

[kickgame]

When migrating to the new Checkout Extensibility you no longer have access to the checkout.liquid anymore.

Issue is we have a script -

<script>
    const cartUrl = document.querySelector('a[href="{{ shop.url }}/cart"]');
    if (cartUrl) {
      cartUrl.setAttribute('href', '{{ shop.url }}?cart_drawer_open');
    }
  </script>

That automatically redirects users to their open cart drawer when they click on the Cart breadcrumb in checkout.

What is the best way to solve this?