How to edit Order Recieved page

Hi!

I’m having a bit of trouble figuring out how to edit the “Order Received” page. I’m trying to add links to the page, which would have been really simple before, but woocommerce changed them from pages to endpoints. I think I have to edit something in a PHP file? I’m really confused as to how I would go about this…
If anyone knows how to do this, I would be very grateful!

https://wordpress.org/plugins/woocommerce/