It would have to find an open Wi-Fi network that isn't gated behind a captive portal, which is very rare. Rare enough that most telemetry would be too stale to be useful.
> which is very rare.
This depends a lot on the region/country. IN the US, open WiFi is unusual but it's pretty common in parts of asia, for example.
Cable ISPs such as Spectrum sell capacity on their customers routers for such situations, including ‘smart’ appliances.