The device has not been formally certified for dust resistance. It does not mean zero protection; it simply means it lacks an official laboratory rating.
Because of this ambiguity, this article breaks down both possibilities so you can find exactly what you are looking for. ipx566 full
The 'X' in "IPX566" signifies that the device has not been officially tested for dust resistance. However, the subsequent numbers denote a tailored, highly robust water resistance level. The device has not been formally certified for