Apple and Microsoft are also subject to US laws. It's not like any company can get around this.
That statement is true at face value. But if you look at how Eric Schmidt travels with government representatives, how rich and powerful BigTech is, and how much they individually and collectively spend on lobbying, then they could be a massive obstacle if they only cared.
Administrative warrants do not carry the weight of law. It's merely a term of art for a request for information.