Evergrande isn't the only one to default, There are at least 5 others. And the US is heavily invested in all, The global supply chain is at a basic stand still, inflation is the highest since 2008, American debt is the highest its ever been, The US stock market is so over leveraged that a crash is imminent. There is a shortage of labor for skilled trades while unskilled workers are quitting by the millions. The price of lumber and other building materials are triple what they were 2 years ago. Effects of the eviction moratorium has yet to be felt. Oil is projected to be $100 a barrel within the next 6 months which is nearly double what the average Has been.
These are just off the top of my head. There are many more reasons that will pop up in a Google search. This has been brewing for years. The pandemic is helping bring it to fruition quiccker