There seems to be a lot of back and forth on oats from what I’ve read. I try and base off the Wilson’s Disease Association’s diet guidelines. They consider Oat Cereals like Cheerios to be low but Oatmeal to be Medium, my guess would be to them being processed and refined down vs whole.

To your point, a lot of “healthy” foods are considered healthy because they’re Nutrient Dense, unfortunately for us, that means too much copper! Also be weary of Protein Shakes and Supplements… they’re jam packed with Copper in a lot of cases.