If you are opted into ShopPay and shopping on your mobile device, after you add items to your cart and then click "checkout" it will automatically take you to the ShopPay checkout screen. Unfortunately, ShakeUp Rewards is not visible through third party payment apps such as Shop Pay.
As a workaround, you can opt of out Shop Pay in order to use the normal Orgain.com checkout process. To opt out of Shop Pay, please follow this link and instructions found here: https://shop.app/opt-out.
Once you have opted out of Shop Pay, you can place an order through the Orgain.com billing and payment section. Please ensure you are logged into your account, use the dropdown menu to redeem your ShakeUp reward points (if all items are one-time purchase).
Check out this article: How do I spend or redeem my points?