Click to Chat have special settings for WooCommerce pages.
Single Product pages
We can change call to action, Prefilled message for Single product pages. Dyanmaic variables like {product}, {price}, .. are available.
WooCommerce single product pages
Cart, Checkout pages
WooCoomerce cart, checkout are also post type of pages. This pages are avalibale at WordPress admin -> pages.
we can modify this pages settings while editing the page at the right sidebar click to chat metabox