In most markets an Indian business can open a WhatsApp relationship with an approved marketing template to a customer who opted in. For Austin's +1 numbers that door is shut: Meta does not deliver marketing templates to US numbers. What remains are utility templates about something the customer already has with you, authentication codes, and replies.
Replies are the opening. When an Austin customer taps a link and sends the pre-filled line, a 24-hour window opens in which your team can write freely, attach a document or a catalogue page they asked for, and answer follow-ups. Each new message from them restarts the clock.
So the work moves upstream, to where Austin customers already meet you: order confirmations by email, the checkout page, the invoice, the parcel, the student portal. Each placement gets its own link and its own tag, and the customer decides whether to start.