Originally filed only against the city and the PD, and only for $10M, and it's a weak conspiracy claim. They are fishing for a settlement and added Kyle for the publicity it will bring. The article doesn't even mention anything about "wrongful death", just
"In broad strokes they are saying [Huber's] constitutional rights to be free of excessive force were violated because law enforcement worked in concert with Kyle Rittenhouse to intimidate and ultimately to kill peaceful protesters who were there to exercise their rights," she said.