What does a human override need in order to work in practice?
A human override only works if somebody knows how to use it. Name who can pause the workflow and under what conditions, give them a real control, and plan for the work left unfinished when it's paused.
Human oversight of a workflow needs a practical way to interrupt it, so the responsible person can act before an unresolved concern turns into an external effect. Give them the actual control or a supported route. Pointing them to a sponsor who's unavailable doesn't count.
Rehearse it with a sample interruption. See whether new work stops, what happens to work already in progress and how the team knows which actions finished before the pause.
Decide who investigates and who can restart. A restart should wait on a resolved issue and the right approval, and someone wanting the queue to move again isn't enough. Tell employees how to keep essential work going in the meantime.