I checked that page and checked the page specifically addressing Sovereign Immunity in the USA. Other than the repeated assertion that the US government has it

I checked that page and checked the page specifically addressing Sovereign Immunity in the USA. Other than the repeated assertion that the US government has it on the wikipedia page, I could find no evidence that they do. For instance, I doubt the constitution provides for this immunity. I think that this immunity is not legal. But maybe I missed some text in the constitution that grants it.