Force Add To Cart for WooCommerce allows you to select a product which will automatically be added to the shopping cart when another product is added to the cart. Simply visit the “Linked Products” section on the edit product page and choose the product to be force added to the cart when that product is added.
Additionally, you have the ability to select whether a visitor is able to remove the product that was forcefully added or to restrict removing the product from the cart.
The plugin works with both the classic cart experience and the new React based cart block.
Built by WP Geeks.
Usage
Once you have installed the plugin, you will find the settings on the Edit Product page in WooCommerce, under the section Linked Products in the Product Data metabox.
Screenshots
For a product to be added to the cart when a simple product gets added to the cart
Search for a product to force add to the cart
Variable product settings for forcing a product to the cart