What do you think the "very specific process" involved for the federal government waiving immunity to tort claims? I assume that is what you mean by "waive torts" which is a phrase that doesn't really make sense. Since it is "very specific", can you describe it?
You ask what the procedure is, and then link right to it. Legislation giving citizens the right to sue in certain scenarios. Without the government's OK, no suing the government.
The decision here would be "there's no clearly established law that the US can't shoot down a balloon with an F-22" on qualified immunity grounds.
Again, you may want to carefully read the article you linked, and linked articles within such as the one on the Federal Tort Claims Act: https://en.wikipedia.org/wiki/Federal_Tort_Claims_Act