There is no Record payment button.

It only shows while the order has a balance owing. A fully paid order shows the receipt actions instead.

Cash is missing from the payment tabs.

Cashless only at POS is switched on in Settings > Features, which removes Cash from every payment screen.

It appears only for completed counter payments (cash, card, e-wallet or other) and only for roles allowed to manage services and sales.

An order with a balance still owing shows a Record payment button. Use it to mark the order paid once the customer pays at your counter.

Open Orders and tap the order that still has a balance.
Tap Record payment. The Take payment window shows the amount due.
Pick the tab for how the customer paid: Cash, Card, E-wallet, Gift card or Split.
For cash, type the Cash received. For card or e-wallet, take the money on your own terminal or QR first, then enter the Amount captured and the reference if you have it.
Tap the button at the bottom of the tab. It shows the amount, for example Record plus the amount for cash or Mark plus the amount as paid for card. The order is marked paid and its receipt can be printed or emailed.

If someone tapped Cash when the customer paid by card, you can correct it without a refund. No money moves and the cash drawer updates by itself.

Open the order and find Payment history.
Tap Edit method on the payment.
Choose the right method, add an optional reason (for example "wrong button tapped") and tap Save.

Nothing changes for the customer until you print, email or send the receipt; staff see the order move to paid.

There is no Record payment button.: It only shows while the order has a balance owing. A fully paid order shows the receipt actions instead.
Cash is missing from the payment tabs.: Cashless only at POS is switched on in Settings > Features, which removes Cash from every payment screen.
I cannot see Edit method.: It appears only for completed counter payments (cash, card, e-wallet or other) and only for roles allowed to manage services and sales.