The allegations that Olympic boxers Imane Khelif and Lin Yu-ting failed an eligibility test for women's competition have been made by only the International Boxing Association.
Except, pretty much anything negative that happened in the last 15 years (especially tied to social media) if you look into it Russia always seems to be involved.
I recommend reading: "Road to Unfreedom: Russia, Europe, America" by historian Timothy Snyder.