Looks great! What about readability though?
Text seems low contrast to me. Although I have a poor vision and most things seem too small and low contrast to me.
The 30–60 minute delay then 24-hour follow-up is a sensible cadence. The part I would harden next is the stop conditions: once the cart converts or the customer replies, every channel should cancel, and WhatsApp especially needs a clear opt-in trail before the first send....