What he said is absolutely correct, but he didn't tell you everything.
They do not test EVERY kind of ram out there that would be prohibitively expensive and time consuming to say the least.
So broaden your horizons look for Ryzen compatibility instead of your specific motherboard unless you want to limit your options drastically.
Chances are if it works on another Ryzen board it SHOULD work on yours.
Maybe you want RGB (All the craze, not my cup of tea but to each their own) or flames or blue or whatever floats your boat.
I would be more concerned with the height and interference with the CPU HSF. Again depends on what you are putting in there.
buy from a reputable dealer and return if there is a problem.