AIO fans recognized as MOS fan 1

Hi everyone,
just built a new desktop including among other things an Asrock Z790 Taichi and the be quiet! Pure Loop 2 FX 240mm.
The only problem I’m having (tbh I’m not 100% sure it even is one) is that the AIO fans are recognized as MOS Fan 1. It doesnt matter where I plug them in, currently they are in the CPU fan 1 slot, or more precisely the two AIO fans are plugged into the included ARGB-PWM-Hub which then connects to CPU fan 1.
I have the same modes (Standard, Performance, Silent, etc.) as I would have on the CPU fan 1 slot.

Could the be quiet Hub be the reason? Is the whole thing even an issue?

Thanks for any pointers and enjoy the rest of your weekend!