It is important to not that nuts and dark chocolate usually fit the ultra processed (or sometimes just processed) food definition. This poses real problems in studies because they are roughly a net benefit health wise so authors have the choice between excluding them from the study (which misleadingly worsens claims about processed food being bad) or keeping them in (misleadingly softening how bad they are).

Also many traditional foods like cheese would probably get classified that way if they were invented today.

nuts are ultra processed?