I’ll read the full article later, but based on the abstract, it doesn’t sound promising. Maltose is readily absorbed being a simple sugar while amylose is a multi-sugar (and one of the components of starch) that has to be broken down first in the digestive tract, so I don’t think those are comparable.
Based on your ref, I’m not convinced that this is truly the case though.
What you are essentially saying here is that you don’t believe sugary drinks will spike your blood sugar level.
There seems to be a confusion here:
Amylose is a polysaccharide and one of the two compounds that form starch (alongside amylopectin). What Oatly adds is amylase, one of the enzymes in our body that breaks down polysaccharides into absorbable sugars which means that their oat milk already contains higher amounts of reduced sugars due to that process which is shown in the study I’ve linked earlier.