Well, it might have been done. But something to remember is that whites had no immunity to the disease. Washington had his army immunized because the “smallpox” had spread widely in the Continental Army. Disease did moret to end the Quebec expedition than the Redcoats did.
As for white diseases and indians, Desoto’s expedition destroyed whole indians communities, some even before making direct contact. Further Soto had brought a lot of pigs with him and they spread the disease into the local wildlife when they themselves went while. The razorback in Arkansas probably came from De Soto.
I believe there was one documented case where it was done, and that was woven into a widespread scheme by those in the victimhood industry. As far as any real historian is concerned, it happened once.