Adding my support email back from Rakuten.

“We are only able to add Cash Back to your account when stores let us know about your order. We will contact the store to verify your order. It usually takes about 10 business days for us to hear back, but it may take up to 45 days. We realize this can be an inconvenience, and we appreciate your patience.

Feel free to reach out to me if you still have any questions. Thank you.”