Hello there, @jeff Siegel.

Allow me to chime in and share some information about bill approvals in QuickBooks.

In QuickBooks Desktop, the approver doesn't need to be an admin, but user permissions or roles might restrict who can be selected. If certain users aren't appearing, it's likely due to permission settings. Check their permissions and roles to ensure they have the authority to approve transactions. Adjust as needed to grant the necessary authority.

You can check this article for more details: Set up purchase order and bill approval in Enterprise.

Also, I encourage you to visit our QuickBooks Help page, so you can browse articles or even questions of other QuickBooks users that were answered by QuickBooks experts. This will help you earn more QuickBooks knowledge that can help you with your accounting tasks. 

Keep in touch whenever you have additional questions about the Bill and PO approval workflow in QBDT 2024. I'll be happy to answer them for you. Stay safe and have a nice day ahead.