I have an article somewhere, will dig for it later, that goes over several methods. It is more towards low ABV rather than no alcohol. One of the methods, and the only one I’ve tried so far is to mash at a higher temperature. This activates other enzymes that produces longer (more complex) sugar chains. We want these as regular yeast “cannot” convert those to alcohol. So more complex sugars means more sugars left after fermentation which means we can run a lighter malt bill and still have plenty of sugars left.

And then hop it well.