Health monitoring is usually not real-time, but based on data blocks provided once per flight; though there may be more than one block/transmission.
Interesting phrase in the press quotation above
conducted a detailed boroscope inspection of both engines
- which might be normal maintenance SOPS, or perhaps related to specific advice...
However, in recent hours information has been conveyed to the airline by Rolls Royce that the second on wing engine on this aircraft has itself being the subject of similar damage.
The latter indicates positive usage of health monitoring systems.