NOVA classification system. You're mixing different ingredients in an industrial process, some are further processed (roasting), some aren't, adding lots of salt, putting them in a high-convenience packaging. This all adds up to a NOVA Type 4 rated ultraprocessed food.
The delta between what these definition mean and what the public thinks they mean is 90% of why this is a problematic, unscientific, woo-woo bullshit label. If people wanna start talking about specific ingredients, or generally foods that are engineered for hyperpalatability, yeah, great, let's go. But the criteria for the "ultra-processed" shorthand is so misaligned with what people think it is that is it dogshit useless.