By Amy Tennery BEIJING (Reuters) – United States Olympic officials said they learned lessons from the Tokyo Games on supporting athletes’ mental health, taking a proactive approach in Beijing where isolation and COVID-19 fears have piled on more stress. Gymnast Simone Biles, a four-time gold medallist, rewrote the playbook on mental health in Tokyo, championing athlete wellbeing in a conversation once seen as taboo that nonetheless resonated from the Summer Games to the Winter. The U.S. Olympic and Paralympic Committee (USOPC) conducted mental health screens around anxiety and depression last …