In about a week, I would contact your local social security office and inquiry. By then they should have notice of the order and should be able to verify the waiver.
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I would douby you will get any money. SSA is not saying you were due the money- just that the money you owe them was not due to your fault and they will not make you pay it back now. It may depend on the exact wording on the decision.
That said, when SSA waives an overpayment, they usually waive the amount still uncollected, and do not say part of it has been collected and can now be re-released to the claimant. A waiver means in fact you HAVE been overpaid, they just agree to not collect it now. So, even if the decision waived the entire amount, SSA is not going to voluntarily send you the amount you were 'underpaid" because that is money you were not due in the first place.
So, I would not expect to receive any additional payments
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