It would be like Saudi Arabia indicting Anheuser Busch for violating sharia law for selling beer inside the US.
The Russians then stole medical records and other data of athletes, including Serena and Venus Williams and Olympic gymnastics champion Simone Biles, and published them through a group that called itself Fancy Bears.
That's the American connection.
Those are valid points Karl. Some of the athletes’ medical data which the hackers stole and compromised as revenge were from Team USA. The key whistleblower, Grigory Rodchenkov (but also athlete Yulia Stepanova and others) have claimed asylum in the U.S. and filed lawsuits from here...
It also has to do with the international nature of groups like the International Olympic Committee and World Anti Doping Agency. The governments of multiple countries deal with these things.