Just saw this thread and honestly, I feel your pain. I have spent a decade dealing with enterprise procurement systems and the Amazon Business UI is still a total mess. Over the years, I have learned that their permission hierarchy is basically built on legacy code that doesn't talk to itself properly. If you want the official Approval Workflow to work, you gotta follow these specific steps because the logic is weird:

• First, create a specific Purchasing Group for your event team.
• You have to set yourself as the Requester and your boss as the Approver within that specific group.
• Toggle the Shared Carts option to ON under Group Settings, otherwise your cart remains private no matter what you do. Lists are a nightmare because they dont lock in the vendor or price, so someone always ends up buying the wrong version. I once lost an entire day of work because a sub-user accidentally picked a third-party seller with 3-week shipping instead of Prime. Btw, if youre struggling with sharing baskets, Smartphone Board covers a few ways to manage it.

Can confirm this works. Did the same thing on mine and its been solid ever since.

Honestly, the official settings are a maze. I use amazon cart share cuz it's way faster to send my cart over without messing with any permissions or admin panels.