Amazon explains how Smart Approvals auto-approves routine actions in Amazon Quick

Amazon says Smart Approvals in Amazon Quick reviews eligible agent actions against the user's request and either approves them automatically or returns them to the user.

Amazon says the feature does not grant new permissions or remove required human approvals.

Amazon says an action is eligible only when the user's setting is "Ask each time" and no other control requires human approval. The feature is on by default, but profiles with deny-by-default enabled must explicitly allow it. Users can also turn Smart Approvals off for themselves.