I currently have two Sync Controllers running in my machine off of one 5v argb header. I have a rog b550 gaming f and currently 3 140mm trio fans. I'm running two on one controller and 1 on the other. I have full control in aura sync of the lights and the rpm of the fans I can set also.
So yes it can work.
My hope is that I will be able to run 6/7 trio fans in total, I'm just not sure yet if that will be too many leds for the argb signal to carry to or if the sync controllers themselves draw power from the header in addition to their sata supply, as this might cause issues too.
I'll post more when I know.