How to bulk approve PO's

Summary:

Hi Experts ,

We have uploaded PO's using FBDI and the status of PO is Pending Approval . There are more than 2500 PO's , Is there a way where the approver can do bulk approve .

I've followed the notes PRC:PO: How To Mass Approve Large Number Of Purchase Orders ? (Doc ID 2471920.1).

As per the above document , In BPM UI to select multiple approval tasks and approve all of them at the same time but i dont get the Approve option under action .Attached the screen snip

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