Does NetSuite have open PO SNAPSHOT report? To see unbilled PO amount as of any specific date

Search for the "Open Purchase Orders" report. It will list all open (unbilled) Purchase Orders and give you a summary / subtotal. You can customize that report from there for more specific needs. We use it daily in our environment to keep tabs on what potential payables / item receipts we might be expecting at a given moment, or to throttle spending to avoid a barrage of receipts and payables.

But the amount columns do not reflect the unbilled portion as of the date selected. Am I wrong?

On my "out of the box" Open Purchase Orders Report (not customized), the "Current Amount" is the open amount. If I change the "As of" date, the numbers change in the direction I would expect.

That's so weird. Mine is showing the current amount as of today regardless of the date filter. Lemme test it again