I’d like to have the checkout billing form on two columns. Is there a way to wrap half of the fields in a div and the other hald in another so that it’s easy to use a float or flexbox?

The form is invoked from form-billing.php via do_action('woocommerce_before_checkout_billing_form', $checkout);, but I’m clueless as to where I could find the form template itself to modify it.

I’m also aware that a woocommerce_checkout_fields filter exists, but that doesn’t seem helpful to wrap fields in some divs.