The cart goes out from your number through the WhatsApp Business Platform, the official version. In Channels, tap “Connect WhatsApp” and go through Meta’s sign-up: pick or create the business account, add the number and verify it by SMS or call.
The number cannot be in the WhatsApp Business phone app at the same time. If it is, Meta asks you to migrate it; old conversations stay on the phone, new ones arrive in LiveShopia.
After connecting, the templates for cart, reminder and confirmation are submitted to Meta for approval; it usually takes minutes to a day. Until approved, the bot only sends within the 24-hour window after the customer writes to you.
If it still does not work: check the number and template status in Channels. A rejected template shows the reason; edit and resubmit.