How do I view the execution history of an automated rule?

On the Ads Editor Rules page, each rule has an execution history: when it ran, what it evaluated and what action it took (or why it didn't take one).

It answers "did the rule run?" without contacting support. Open the rule and see the list of recent executions with date, time and result.

If a rule shows no executions, check that it's active and that its condition can actually happen (for example, a CPA rule only runs when there is spend in the evaluated period).