How to refund an order. I cannot find that option anywhere after payment.
Attached, 2 screenshots
This is a known gap with sandbox. You can only refund payments with the Refunds API with sandbox. 
okay, I’m sure this is posted somewhere in the documentations. I wonder why this question didn’t receive any square AI answer nor I received any email notification about your answer.
App is ready for review. Hopefully it gets noticed soon.