Try again! The regulation changed during IEC 2023. If you could not travel to Canada before your POE letter expired in the past, it doesn’t count as a participation anymore. So apply again under regular IEC, you don’t need a RO anymore.
Example: You are from the Australia and you had an approved Working Holiday (POE) before the pandemic but never applied for an extension, losing your opportunity to enjoy a working holiday in Canada. If you apply under regular IEC, now you will be you will be approved!