Practice mode opens a separate copy of the POS with sample data. Nothing you do in it is real, and the real shop is never touched.
Diagnostics hold the app version, storage use, sync state and recent errors. They hold no customer names, phone numbers or money.
Waiting for the customer to tap, insert or swipe their card on the reader.
You can use {{firstName}} in the subject too.
{{firstName}} {{customerName}} {{businessName}} — filled per customer when sent.