I want customers receive a QR-code of the order and show it to employees when they visit. The administrator scans it with mobile application and immediately sees all the details of the order.
Thank you for your inquiry.
Unfortunately, at the moment there's no such a built-in feature in Amelia.
Basically, there are no tickets at all, in any format. Probably, it can be achieved with another plugin or service through webhooks, for example (since Amelia can send information about each booking through a webhook), but we can't tell you precisely.
Please feel free to ask us any other questions you might have.