Hi @erbete,
It seems there’s a misunderstanding. Please allow me to clarify.
The Jetpack plugin is not required to use Google Listings & Ads. However, Google Listings & Ads requires you to connect your site with WordPress.com. While Jetpack services power this connection, the Jetpack plugin itself is not required for the connection. Google Listings & Ads can connect to WordPress.com directly without the Jetpack plugin.
The notification you’re seeing is for the Jetpack services used for the WordPress.com connection and is not related to the Jetpack plugin. Setting up Google Listings & Ads again and connecting to WordPress.com will initiate the required connection.