There are many free WordPress themes available that are compatible with WooCommerce. Here are a few popular options:
1:-  Astra: Astra is a lightweight and customizable theme that is optimized for speed and works well with WooCommerce. It also offers a range of starter templates for different types of online stores. Storefront: Storefront is a free theme developed by WooCommerce. It is designed specifically for WooCommerce and offers a range of customization options, including different color schemes and layout options. 
2:- OceanWP: OceanWP is a versatile and customizable theme that offers a range of design options and works well with WooCommerce. It also includes a range of premium features, such as a sticky header and custom widgets. Hestia: Hestia is a modern and stylish theme that is fully compatible with WooCommerce. It offers a range of customization options, including different color schemes and layout options.
3:-  Neve: Neve is a lightweight and fast-loading theme that is optimized for performance. It works well with WooCommerce and offers a range of customization options, including different header and footer styles. These are just a few examples of the many free WordPress themes available for WooCommerce. Ultimately, the best theme for your store will depend on your specific needs and preferences.