It looks like the article was referring to M1. The numbers are accurate. They include the most liquid form of money but don’t include the immense additional stimulus added by other forms of less liquid money, such as federal debt (held as Treasury bonds which are not included in M1) or Federal Reserve debt (which is held as Treasury and mortgage bonds, also not included in M1).
This tsunami of money is the source of the asset and consumer price inflation we are seeing now.
If you look carefully, you will see they changed what is included in M1.
“As of May 2020, the old M1 would have had a value of around $5 trillion. The new M1 has a value of $16 trillion, a substantial increase and a clear break in the time series.”
https://fredblog.stlouisfed.org/2021/05/savings-are-now-more…
PSU