You can still find the list of your purchase orders by navigating to the Expenses menu in QuickBooks Online, Raj.
Once there, head to the Expense Transactions section, where you can use the drop-down menu to select Purchase Orders. It will display your list of purchase orders, similar to how it worked in the previous interface.
See the screenshot below for your visual guide.

You can also locate it from the Inventory menu as seen in the image below.

If you have additional questions or need further assistance navigating the updated interface, please don’t hesitate to reach out. We’re here to guide you every step of the way.