Welcome to the community and thanks for posting!
Do you already use something for tracking your shopping list? And if so, do you know if they have an API available? Unfortunately while both Amazon and Google have excellent support for shopping lists via their voice assistants, they are a ‘walled garden’ and don’t provide API access to get that data out.
On the other hand, purpose built ‘list’ apps like Todoist provide APIs that could be used for integrating them. Here’s a relevant feature request for a Todoist integration.