It's not just more cash (increase "demand"), it's also reduced supplies due to many businesses shuttering or reducing output during covid.
[0] https://www.bea.gov/news/2021/gross-domestic-product-4th-qua...
Your response illustrates the likelihood that the article is a stealth attack on government stimulus to the non-rich, to deflect the possibility of more straightforward solutions, like curtailing stimulus to the rich.
You're looking at the total supply (which is true in the long term, since those dollars have to be spent eventually). However, inflation in the short term has much more to do with velocity and actual spending - if all of that money just sits in bank accounts, there will be no inflation.
So looking at the money supply in isolation will tell you nothing about the actual inflation. It's about what's happening to that money.