To people who don't watch the stock market: this didn't happen. The "government" can't physically print that much money per day. And even if it could, stock exchanges don't accept cash.

The money supply increased about $3.5 trillion in 2020, as you can see in this chart. Nowhere near $2 trillion per day.

Also, the US Treasury and the Federal Reserve (separate organizations) don't buy stocks. They buy Treasury Bonds or sometimes mortgage backed bonds, although that last happened during the 2008-9 recession.

After reducing the federal funds target close to zero during the financial crisis, the FOMC turned to another type of policy to provide liquidity to the financial system and to encourage recovery: the purchase of large amounts of longer-term U.S. Treasury securities and mortgage-backed securities, also through open market operations.

https://www.stlouisfed.org/open-vault/2019/august/open-market-operations-monetary-policy-tools-explained