Yes. eSIMAdvice currently lists 29 Redsim Zambia plans.
The cheapest Redsim Zambia plan is Zambia · 1 GB · 1 day · 4G, at $4.54.
Global · 193 countries · 20 GB · 30 days · 5G has the lowest price per GB right now: $2.70/GB ($53.99 in total).
No coupon is applied to these prices right now.