I’m trying to setup a basic coupon – here are the parameters:
Customer must buy at least 1 of Product A (there are 3 available products).
When that criteria is met, customer will get 20% Off of Product B (there are 6 options and customer can buy as many as they want with 20% discount).
What’s the best way to set this up?
Not possible without custom php. You can create a coupon for coupon B and use filter woocommerce_coupon_is_valid to disable the coupon if A is not in the cart.