Multia1,
The context of the situation should be reconsidered, use an alternative viewpoint before considering an option to restart the engine.
Are you attempting to word-match the abnormal procedure (descriptive advice) with the situation. SOPs cannot cover all eventualities.
Is the concern about any difference between highly reliable engine indications or the consequences of restarting with an indicated failure.
Is the aircraft flyable; if so fly it. If not consider restarting according to the need for thrust; there are very few scenarios where an aircraft will be unable to fly with a single engine failure. Don’t invent too many contributions in considering a mental ‘what if’ course of action. The training task should focus on how to think, not what to think.
Is the engine producing the required / expected thrust; check EGT/EPR in conjunction with rotor speed, aircraft yaw / roll motion. Are the engine ancillary systems working; elect generator, hydraulic pump, air supply; do you know which shaft drives them.
What was the history of the event, the preceding indications of engine / system operation; fluctuating or sudden change. Etc.