If you are genuine, then I have thought that the 054B could be a tanker for smaller vessels like USVs ever since someone here first pointed out its RAS stations. They are next to the slanted launcher and can take advantage of that part of the hull with its openings. The 054B is is much bigger than the 054A and we know that weight isn’t going to weapons, so it’s mostly for fuel which we have been assuming is only to give it very long range, but which could actually be used to keep a whole swarm of USVs fueled for a long time