Payment integration such as razorpay, paypal etc
White Dolffins
I have seen this info on Facebook Business Manager > Whatsapp Manager. You can integrate your payment gateways here. Once you have connected the payment gateway to the Whatsapp Manager, then proceed here to configure Whatsapp Flow for automating the payment collection with in Whatsapp Chat
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https://developers.facebook.com/docs/whatsapp/cloud-api/payments-api/payments-in/pg