Memory runs only at 1066Mhz (DDR4-2133 ASRock AB350M PRO4)

Hardware noob here.

I've got these two (2x8 GB, Patriot Viper Elite DDR4-2133 CL14) running on my ASRock AB350M PRO4

They are slotted at A2 and B2 as mentioned in this manual. (I Have a Ryzen 7 1700 cpu)

But when I look at the frequency, both CPU-Z and the task manager show them running at 1066Mhz.

I looked in the UEFI and as far as I can tell, the configuration should be fine. There is not much I can change anyway, for XMP profile I can only select "Auto" or "XMP 2.0 Profile". I have no clue what to do, can anybody help?