WooCommerce Shipping Calculated after Coupon

functions.php

<?php

// WooCommerce Shipping Calculated after Coupon

add_filter( 'woocommerce_shipping_free_shipping_is_available', 'filter_shipping', 10, 2 );

function filter_shipping( $is_available, $package ) {
	if ( WC()->cart->prices_include_tax )
		$total = WC()->cart->cart_contents_total + array_sum( WC()->cart->taxes );
	else
		$total = WC()->cart->cart_contents_total;

	$total = $total - ( WC()->cart->get_order_discount_total() + WC()->cart->get_cart_discount_total() );

	// You can hardcode the number or get the setting from the shipping method
	$shipping_settings = get_option('woocommerce_free_shipping_settings');
	$min_total = $shipping_settings['min_amount'] > 0 ? $shipping_settings['min_amount'] : 0;
	
	if ( 50 > $total ) {
		$is_available = false;
	}

	return $is_available;
}

// This basically recalculates totals after the discount has been added
add_action( 'woocommerce_calculate_totals', 'change_shipping_calc' );
function change_shipping_calc( $cart ) {

		$packages = WC()->cart->get_shipping_packages();

		// Calculate costs for passed packages
		$package_keys 		= array_keys( $packages );
		$package_keys_size 	= sizeof( $package_keys );

		for ( $i = 0; $i < $package_keys_size; $i ++ ) {
			unset( $packages[ $package_keys[ $i ] ]['rates'] );

			$package_hash   = 'wc_ship_' . md5( json_encode( $packages[ $package_keys[ $i ] ] ) );

			delete_transient( $package_hash );
		}

		// Calculate the Shipping
		$cart->calculate_shipping();

		// Trigger the fees API where developers can add fees to the cart
		$cart->calculate_fees();

		// Total up/round taxes and shipping taxes
		if ( $cart->round_at_subtotal ) {
			$cart->tax_total          = $cart->tax->get_tax_total( $cart->taxes );
			$cart->shipping_tax_total = $cart->tax->get_tax_total( $cart->shipping_taxes );
			$cart->taxes              = array_map( array( $cart->tax, 'round' ), $cart->taxes );
			$cart->shipping_taxes     = array_map( array( $cart->tax, 'round' ), $cart->shipping_taxes );
		} else {
			$cart->tax_total          = array_sum( $cart->taxes );
			$cart->shipping_tax_total = array_sum( $cart->shipping_taxes );
		}

		// VAT exemption done at this point - so all totals are correct before exemption
		if ( WC()->customer->is_vat_exempt() ) {
			$cart->remove_taxes();
		}
}

add_filter( 'woocommerce_table_rate_query_rates_args', 'filter_shipping_2', 10 );
function filter_shipping_2( $arguments ) {
	if ( WC()->cart->prices_include_tax )
		$total = WC()->cart->cart_contents_total + array_sum( WC()->cart->taxes );
	else
		$total = WC()->cart->cart_contents_total;

	$total = $total - ( WC()->cart->get_order_discount_total() + WC()->cart->get_cart_discount_total() );

	$arguments['price'] = $total;

	return $arguments;
}