It does not even matter if it was an ETOPS flight. ETOPS is an aircraft AND operator certification. You just don’t buy a 777 and automatically have ETOPS capability.
All ETOPS types are easily flown on one engine, and the aircraft systems required have plenty of redundancy, so it really comes down to engine reliability.
3 failures in 3 yrs doesn’t sound so bad. 3 failures that are nearly identical in 3 yrs sounds a bit worse. 2 of those failures in 3 months. Fatigue cracks found in 2010 and 2015, yet covered up with some pure BS. Ouch.
Now add in all the Pratt 4000 series issues (ex. 747-400 of of AMS the same day).
It will be interesting to follow.