There are 2 ways to control how many products you want to display on WooCommerce archive pages.
1. In the archive products module, if you are using the “Default WooCommerce Loop”, Divi itself will control how many products to display.
To change it, go to your admin dashboard -> Divi -> Theme Options -> Number of Products displayed on WooCommerce archive pages.
This option affects the Shop page, product categories, and product tags pages.
2. If you are using any other type like the recent, featured, best selling… you will be able to change that via the module settings by changing the “Product Count” option.