Woocommerce Custom Plugin Dynamic Content

I am implementing a custom payment plugin that extends Woocommerce. On the checkout page, when the user clicks on the button, I need to fetch a QR code to display.

public function process_payment() {
         ...
         try {
            $response = json_decode($this->getQr('url'));
         }
         catch (Exception $e) {
            echo $e->getMessage();
            die();
         }

         $url = $response->url;
         $qr  = $response->qr_code;
    }

I am getting the response correctly but I just need to find a way to hide the checkout button and display the QR code. Is there any hooks that exist for that?