>a completely seamless order-and-pay-from-your-phone system because it doesn't exist.

(disclaimer: founder) Yes, this is literally what Zerocontact does. Contactless waitlist, menu, order, pay. Hybrid ordering so staff and guests can add items to one check. Fully supports courses. Add dessert at the end of th meal. Still, the customer has one check to pay (apple pay or google pay, or CC). We may even support your legacy POS or you can use ZC in standalone mode. It's a full order-management system for contactless on prem and off prem dining.