Women earned the right in the 60s, but it wasn't until the Equal Credit Opportunity Act passed in '74 until banks were forbidden from requiring a husband's signature.

The Equal Credit Opportunity Act prohibits financial institutions from discriminating against applicants based on their sex, age, marital status, religion, race or national origin.

https://www.forbes.com/advisor/banking/when-could-women-open-a-bank-account/

I worked for a Credit Union as a developer. I can attest that at least where I worked, there was a host of yearly modules you had to complete to ensure you were up to speed on how to not be an asshole and they took it quite seriously.

Really? In my country, women can still have their own bank account