"Smart TVs" come to mind, though this is corporate rather than government. For example there's talk of them having an embedded 5G modem so that they're able to phone home even if you've blocked them from your network, or never connected them to your network in the first place.
Hey, have you ever thought of why even the $149 Black Friday loss-leader no-name-brand TVs all have Amazon Fire, Roku, or are now "Smart" in some way?
Certainly isn't because they need to incentivise you to connect it to the internet so it acts as a Nielsen-esq measurement device of all media you view on the screen via digital fingerprints that exist in all commercial media and advertisements. [1][2]
