I have the genetic markers and high iron from hemochromatosis.
The “stop eating red meat” and dietary suggestions are nonsense.
Your body is going to store iron from whatever sources it can find. Giving it less iron is not going to stop the retention.
I donate blood every 8 weeks and this keeps my iron in check. That is the typical treatment, but my blood is valuable (O+) and I would rather donate it for someone’s use than let the hospital take it from me and throw it away.