USN hasn’t used asbestos for decades...they just went to a very thick high temp lagging.
One of the toughest days I ever spent on the boat was after overhaul during the first steam plant startup. The all new lagging had to cure, and there was a rather thick atmosphere in the engine room that burned the eyes. Took a few days for that to go away. I still remember that smell though.
It's still onboard the ships though. That's one of the reasons no one wanted to scrap any conventional CV's that and the PCB's make it cost prohibitive.
It's still used from a source I just checked History of Asbestos Usage in the Military but no where near too the extent it was back when I was in. In some places I don't see that they would have a choice especially on a riser.
Big E likely has less than it did due to SLEP and other overhauls but the conventionals were loaded with it.
I was on my ship when we came out for a shakedown in and out after the 80 overhaul. I was a one digit midget so I didn't go to the Mains. I usually didn't anyway I was A Gang AC&R. 1 & 2 Aux and the pump rooms was usually where I went to work.