Yes of course I do. You could start by looking at the references in the article, showing that vegetable oil consumption is one of the most tightly correlated factors with the obesity pandemic.

You could also google CGM data for Oats, which even in their natural form spike blod sugar in an unfavourable way for many people.

Which brings me to the only "source" you actually really need: Oatly's products are completely evolutionary inconsistent. And there is an aggregation of anthropological, anatomical and biochemical knowledge behind that statement. I'm writing an extensive article about much of this which will be out soon. So you could read that if you want!