I would imagine the crew would report this incident themselves. Better to own up than await a phone call from the analysts who conduct Flight Data Monitoring. Perhaps after this they might be rostered a training sim as part of finalising and debriefing the safety report. As others have said all this conducted hopefully in a non punitive way assuming it’s an “honest” mistake and not a deliberate deviation from SOP. Not saying this crew did that, benefit of the doubt etc. I suspect we won’t hear what happened.