So far as I know there is no legal way for the US to make a company lie about its activities. That is the basis of warrant canaries, which have not been tested

So far as I know there is no legal way for the US to make a company lie about its activities. That is the basis of warrant canaries, which have not been tested in court yet. You can find cloudflares https://www.cloudflare.com/transparency/ https://www.cloudflare.com/transparency/. They could be forced to not talk about something via a gag order.