This will turn Shipping fee based on Cart total

woocommerce-shipping-based-on-cart

/**
* @author SulaimanMisri
* Load the logic
*/

function makeShippingChangeBasedOnCartTotal( $cart ) {
   if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;

   $total = WC()->cart->subtotal;

   if ( $total >= 100 ) {
      $fee = 10;
   } else {
      $fee = 15;
   }

   $cart->add_fee( __( 'Shipping Fee', 'woocommerce' ), $fee, true, 'standard' );
}


/**
* Run the logic
*/
add_action( 'woocommerce_cart_calculate_fees', 'makeShippingChangeBasedOnCartTotal', 10, 1 );