Far easier for manufacturers to specify non-Bio (which have relatively ‘tried and tested’ formulations) than Bio detergents which vary in their formulation and are liable to contain built in conditioners/softeners.
I always use non-bio, I thought it was potentially less aggressive to (depending on the materials). Generally use Persil or the Fairy one depending on which is the cheapest (I think the really cheap brands all seem to be bio).
the biological part are just enzymes that break down fats and proteins, shouldn’t have any effect on any waterproofing treatment. I think the care treatment of some waterproofing materials even say you should wash in detergents. (I think event is one).