AP Invoice Approval

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Hi,

Can someone recommend how to configure the approval flow for the below requirement;

The approval should be initiated based on the users department which we specify in a DFF in the invoice header level. In the first level there are 2 approvers. For example, user is from finance dept (entered in the invoice header DFF) and the approvers are A & B. If one of them approves it, the invoice should be sent to the next level where there are 2 more approvers C & D.

I tried with the stage Single participant in parallel but it did not work.