* Prevent accessing the first element of the `parentProduct` array if empty
* Include all products regardless of their `stock_status`
By default, the `/wc/store/v1/products` endpoint does not return products with
`outofstock` stock status. We want the users to be able to select any product
regardless of its stock status, we need to explicitly request them using the
`stock_status` query param.
* Use the optional chaining operator
Co-authored-by: Tomasz Tunik <tomasztunik@gmail.com>