To show your WooCommerce products on the Google Shopping tab, you need to create a product feed and set up a Google Merchant Center account. Here's a step-by-step guide on how to do it

Set up a Google Merchant Center account:

Go to the Google Merchant Center website https://merchants.google.com and sign in with your Google account.
Follow the prompts to create a new account and provide the necessary information about your business.
Configure your WooCommerce store:

Install and activate the "WooCommerce Google Product Feed" plugin. This plugin generates a product feed compatible with Google Merchant Center.
Go to your WooCommerce settings by navigating to "WooCommerce" - "Settings" in your WordPress dashboard.
Click on the "Integration" tab and select "Google" from the available options.
Configure the settings according to your needs, including the feed file format, currency, language, and other details.
Save the changes.
Generate and submit the product feed:

In your WordPress dashboard, go to "WooCommerce" - "Marketing" -"Google" to access the Google Product Feed settings.
Configure the settings for your product feed, such as feed name, file format, product variations, etc.
Once configured, click on the "Generate Feed" button to create the product feed file.
The plugin will generate a URL for your product feed. Copy this URL as you will need it in the next step.
Set up the Google Merchant Center feed:

Go back to the Google Merchant Center website and sign in to your account.
In the left-hand menu, click on "Products" and select "Feeds."
Click on the blue "+" button to create a new feed.
Provide a name for your feed, select the country of sale, and choose the input method as "Scheduled fetch" or "Upload."
If you choose "Scheduled fetch," paste the product feed URL generated by the plugin. If you choose "Upload," follow the instructions to upload the feed file manually.
Complete the feed configuration by providing the necessary information about your products, including categories, pricing, availability, etc.
Submit the feed for review.