It does exactly what it says without any problem.
I have the x570 tuf gaming plus which has only 1 argb port, so not even a splitter would be enough for me as I wanted to connect 5 3-pin fans and the port alone cannot power them.
Specifically, the 2 front fans, 1 top, 1 rear, and the graphics card.
It recognizes everything, works perfectly for the 1.5 years that I have been using it, and since it is magnetic, it sticks to the back of the case easily. Ask Takis as well.
The friend below is right to complain because (intentionally?) the ports of the hub's 3-pin are narrower than usual and fit perfectly with the 3-pin of the Coolermaster fans, but they do not fit in the others. However, with a simple scissors or cutter, the job can be easily done. I cut a bit of the plastic casing of the 3-pin cable of the graphics card and everything fit perfectly.
Now everything is controlled seamlessly by the motherboard's software, in my case, Asus's Armoury Crate.

Regarding the PWM hub, it indeed does the job it claims. As for the ARGB hub, it is obviously only for ARGB fans of the same brand, it does not adapt to other ARGB headers