I'm selling a 2021 MacBook I have been using for work. It contains a lot of employee personal information including socials and bank info for people who are worth a lot of money. Most people who would buy it probably aren't going to try to recover this information, but to be safe, is there something more I should do besides formatting the hard drive? Or just format it and don't worry about it?

https://www.howtogeek.com/179284/how-to-securely-wipe-a-hard-drive-on-your-mac/