Filter WooCommerce Order Received Thank You Text

You can filter the text on a WooCommerce order received after checkout, by default the text reads ‘Thank you. Your order has been received’, but you may want to add some further instruction, which you can do using the filter woocommerce_thankyou_order_received_text

Above the original text is being replaced.

Or below the original text is being retained with some new text added.