Thank you for getting back to us, justonwo.

I can see how it would make the account more secure if users can also set up two-step verification.

As of now, the two-steps verification is available if you're the Master or Company Admin of the account. It is designed this way, since you can access all the information of the business..

You can also pin this article that has topics that helps manage your QuickBooks account: QuickBooks Community.

I'll be around whenever you have concerns with your account. I'll be happy to help you out.