To sell more than one product with a single LaunchFlows Checkout Link, simply add the additional products to the end of the ?add-to-cart=xxxx url of the first product, separated with a comma.
Instead of creating complicated variable or grouped products in WooCommerce, it’s far easier to make every product into a simple (one time or subscription) product.
As such, you can then make use of the LaunchFlows features to present and sell any product, at any time, with Marketing Automation.
Original product (ID# 1234) LaunchFlows Checkout Link (example):
To Add Product #2, simple add a comma then the Product #2 (ID# 5678):