I have installed the Woocommerce Google Analytics plugin and although in the Google Analytics test seems that data is flowing it does not show any visitors in real-time. It does not collect any data either.
For test purposes, I switched to the Google Site Kit plugin and it worked immediately and I saw the real-time visitors.
Is there any known issue with the Woocommerce Google Analytics plugin?
If the issue remains, Please make a full backup of your site and check how it works with some default WordPress themes like TwentyTwenty or WooCommerce Storefront to understand if it is our theme issue or not.