G.Skill Ripjaws V (2x, 8GB, DDR4-3200, DIMM 288) with manufacturer's code F4-3200C16D-16GVKB is not listed at ASRock or G. Skill (combination B450 Pro4 and Ryzen 5 2600 (Pinnacle Ridge))
But with the same latencies (Tested Latency 16-18-18-38) and about the same price:
G.Skill Trident Z (2x, 8GB, DDR4-3200, DIMM 288) with the manufacturer's no. F4-3200C16D-16GTZB.
According to ASRock memory support list (Pinnacle Ridge)
G.Skill Trident Z (2x, 8GB, DDR4-3200, DIMM 288)