It doesn't work this way.
Banks are generally the primary way that the money supply grows - through loans.
Consumers and businesses also increase the money supply through use of credit cards and lines of credit, etc.
The Fed has increased the money supply in the past, through Quantitative Easing - using the banks as an intermediary to the corporations.
Your description is correct for how it has generally worked in the past utilizing banks. Direct payments of digital fiat credits to the populace is a game changer. I don’t think you are adequately considering that. Banks are not needed to grow the money supply when you deliver helicopter money the way congress did the last 2 years.