the federal reserve vs narrow bank

https://www.tnbusa.com/wp-content/uploads/2020/03/2020.03.25-TNB-Order.pdf

Narrow Bank - holds customer money at the Fed, and that’s it. The Fed pays it a percent, and Narrow Bank take a small cut - the rest is passed onto the customer.

This type of bank was never granted a charter and their court case suing the fed was dismissed