You turn it off. It says so in the link.
User Controls: Android users always have full control over which of their devices participate in the Find My Device network and how those devices participate. Users can either stick with the default and contribute to aggregated location reporting, opt into contributing non-aggregated locations, or turn the network off altogether.
This is why I buy my TVs from Costco. If it needs internet at any point, return. It’s a TV, it shouldn’t need internet at any point.