The memory you have isn't on the QVL:
https://www.asrock.com/MB/Intel/Z370%20Pro4/index.asp#Memory
The majority of the kits tested @ 3600MHz use Samsung memory/B-Die, so there's hope..... but you'll likely have to manually enter/loosen timings a little.
I haven't used a modern ASRock BIOS, so can't really help on "how" specifically. There's an option in your "Overclocking" menu (AI Tweaker for ASUS, probably another name for ASRock) - around where you enabled XMP (I assume) where you can manually enter timings.
The stock timings for 3600MHz will be printed on the sticker on the modules, or on the retail packaging.
They;'re also on the "spec" page that scout linked: 17-18-18-38
They are compatible with at least two other ASRock boards (ASRock Z170 OC Formula & ASRock Z170M OC Formula) so there's definitely some hope. If I were to hazard a guess, you'd likely have success with manual timings and 3200Mhz or 3400Mhz. 3600MHz *may* be a bit of a stretch, but no harm in trying.