Here is more from a recent Yahoo News piece:
Last fall, the U.S. Air Force simulated a conflict set more than a decade in the future that began with a Chinese biological-weapon attack that swept through U.S. bases and warships in the Indo-Pacific region. Then a major Chinese military exercise was used as cover for the deployment of a massive invasion force. The simulation culminated with Chinese missile strikes raining down on U.S. bases and warships in the region, and a lightning air and amphibious assault on the island of Taiwan.
The highly classified war game, which has not been previously made public, took place less than a year after the coronavirus, reportedly originating in a Chinese market, spread to the crew of the USS Theodore Roosevelt aircraft carrier, taking one of the U.S. Navy’s most significant assets out of commission.
In the early 2000s, China experts and military analysts at the RAND Corporation were given a trove of classified U.S. intelligence on Beijing’s military plans and weapons programs, and were asked to war-game a confrontation 10 years into the future.
What many Americans don’t realize is that years of classified Pentagon war games strongly suggest that the U.S. military would lose that war.“Whenever we war-gamed a Taiwan scenario over the years, our Blue Team routinely got its ass handed to it, because in that scenario time is a precious commodity and it plays to China’s strength in terms of proximity and capabilities,” said David Ochmanek, a senior RAND Corporation analyst and former deputy assistant secretary of defense for force development.
RAND has compiled The US-China Military Scorecard: Forces, Geography, and the Evolving Balance of Power examining US and Chinese military capabilities in 10 operational areas, and presents a "scorecard" for each.
Here is a previous Think Tank Watch piece on US-China war games at RAND as well as details about wargaming at other think tanks.