What's the current status of the 777-300ERSF?

The first flight was back in 2023, but there hasn’t been much news since then. Are they still waiting on FAA certification? Also, I’ve seen some news about IAI trying to use Trent 1000 on 777-300ERSF..does anyone know more about that?

Just curious if the program is still moving forward as planned or if it's hitting delays.