body.theme-astra div.woocommerce form .form-row > label {
  z-index: 3 !important;
}

body.theme-astra div.woocommerce form #shipping_address_2_field > label,
body.theme-astra div.woocommerce form #billing_address_2_field > label {
  opacity: 0;
}

body.theme-astra.ast-checkout-labels-as-placeholders form #customer_details .form-row.ast-float-label#shipping_address_2_field label,
body.theme-astra.ast-checkout-labels-as-placeholders form #customer_details .form-row.ast-float-label#billing_address_2_field label {
  opacity: 0;
}