Unfortunately, I never found solution for that problem. It’s not a problem of Printer trademark but e question of network printer.
You can create a permanent batch who scan this outqs (use the cvtwrkoutq cmd which must be created from help directory of OS 400 4.5) every two minutes. This batch record the status of each spool in a file and compare whith the last status. If no changes (specially number of pages printed), hold and release the spool you verify soon).