1. A Composite Product in Single-Page mode?
No. But you’ll probably want to use the Woocommerce gravity form product add ons
2. How many products can you set in woosteps?
Unlimited. It depends on how many you like to setup
3. Does the extension support {insert plugin/extension name here}?
To get an overview of the official WooCommerce extensions supported by Composite Products, please read over the Extensions Compatibility section.