Does anyone else have ferroportin disease, AKA hemochromatosis Type 4?

Ferroportin disease is considered rare, but I think it may be more common than that. When you have hemochromatosis symptoms ( high ferritin, liver disease, heart arrhythmia, joint pain, fatigue, thyroid disease, etc) they usually check for the 3 genes that hit 95% of people with hemochromatosis. Hemochromatosis 4 is on a gene that they usually don’t test. Mine is SLC40A1. Nebula Genomics picked it up for me. Are there others out there? I feel I am alone. I worry because the only conditions of H4 that I don’t have yet are diabetes and dementia - and I want to do all I can to stave them off.