The Type 002 is the latest aircraft carrier with boilers, and I don't think the PLAN is very satisfied with it.
Also, the boilers used by the Type 002 are actually inferior to the ones used by the Kitty Hawk class, and it would have struggled to power a CATOBAR carrier of the same size as the Type 002.
The earliest Nimitz class carriers actually weigh about 88k, and only the latest version has approached 100k.
Right now the Type 003 is undoubtedly heavier than the Nimitz class, and I don't know how they can suddenly pull out a super boiler that is more powerful than the one used by the Kitty Hawk class without any single trace of evidence.