That still seems like space for an additional 32 VLS?
No. We won't know how much the weight of additional VLS there would affect the center of gravity of the ship, which I would suspect would make it more bow heavy.
Instead, look back at the section where the aft VLS is. That section might be modular to allow for future 055s to be different as amended in the contract. In a future contract, you can stipulate to change the section there for one with 64 VLS so you can a full 128. Or have a section with a newly designed, even larger VLS for ASBMs. Or have said section to have a different mix of the U-VLS and the even larger VLS.