No, when people talk about building software they tend to mean building software. Just like "putting together my own training hardware" doesn't imply you're creating your own wafers from sand.
Sovereign AI is less about being able to build it from first principles and more about being able to tinker and modify what already exists. I can’t train a 30B model, but I can modify the weights of one. I can’t fab my own chips, but I can putter with the software that interfaces with them.
Sovereignty is lost when encryption hides your toys and attestation tells you “you may not”.
Estonian only has sovereign AI as long as they’re allowed to buy from Nvidia. Oh wait, they’re already restricted in what they can get.
But those servers most likely use CPUs not made in China, if I were to hazard a guess, doesn't that mean that that AI isn't "truly sovereign" in your mind then?