Im using the Z590 for my new build and it includes a 5v ARGB headder.
I could not for the life of me find a single piece of documentation, fourm post or just a random comment from a site like Reddit telling me how to set the RGB up.
After a long time of playing around with things I found that you need to enable the 5v within the motherboards settings for CAM which is rather confusing.
It might be a good idea to create a simple guide for users wanting to configure their motherboard headders as there was zero mention of this anywhere online or in the actual motherboard guide.