Is there a way to use the bulk vendor bill approvals (Transactions > Payables > Approve Bills) with a custom approval workflow for vendor bills? SuiteAnswers seems to be saying "No", but when I look at the bill approvals page, I see actions related to the custom approval steps in my workflow (even though I don't see the bills because approval routing is enabled), which is making me start to wonder if there is some sneaky way to do it that I'm just missing.

Yes if you have Approval Routing enabled for vendor bills you can use the Native approve bills page to approve bills through the steps of your custom approval workflow In the action drop down you select the action you want to perform and the list will show bills ready for that action where you are the Next Approver Then upon submit it will transition your Bill to that state (It follows the transitions you have linked to Buttons in your workflow)

Thanks a bunch! I'll play around with the next approver field (I think maybe we're using a custom next approver field instead of the standard one and that's why I'm not seeing bills)