The US or Trump can’t switch off your chips or your networking equipment on a whim - and if they ever designed hardware that could do that, no one would buy such hardware as soon as that capability became known. Using cloud software is a much bigger risk - your access can be turned off anytime and data access is part of the deal.

Sovereignty is not about building everything yourself. Division of labor advances civilization, but it doesn’t have to come at the cost of sovereignty. Sovereignty is about designing the work contract such that you don’t become entirely beholden to another party. You build hardware for me, but after that it’s mine, not yours. I trust you to build the hardware to fulfill that contract, and if you ever break that trust I’ll find someone else to build that hardware. That’s sovereignty. I don’t have to build everything myself.