As I stated earlier, the Taichi & Phantom Gaming are the basically the
same boards, the only difference being that the phantom gaming has an extra LAN port & added chips to support it(right below the VRM heatsink). Look at the pictures and it's obvious.
https://www.asrock.com/mb/photo/X570 Taichi(L2).png
https://www.asrock.com/mb/photo/X570 Phantom Gaming X(L2).png
Did you not watch the video? I was in a hurry to get to work, but the
exact quote from Buildzoid is "The X370 Taichi has a stronger VRM than the (X370)C6H and, uh, I'd say that board is totally viable for the 12 core... like maxing out the 12 core. It could probably even max out the 16 core for core clocks..."
The X370 Taichi was, in terms of power management, simply the best X370 board. It took high-end X470 boards from other manufacturers to catch up, and the Taichi still has a better VRM than some X470 boards. I imagine though, that many X570 have finally got in line with where the Taichi was with X370 because of the likelihood of a 16 core in the future.
If we're talking about this board in particular, however... even if it has the exact same VRM layout as the X370 Taichi, because it's water cooled it will more than be able to handle whatever the 16 core happens to pull because the limit is thermals, not power draw.