If it isn't cow milk it shouldn't just be called "milk". Same for cow milk butter, meat, and honey. The majority of consumers expects to get a very specific product when they read those words without clear qualifiers like in "peanut butter" and "goat milk".
We in the EU can be sure that if it is called honey, it's made by actual bees instead of flavored corn syrup. That's a good thing. I like those consumer protection laws preventing companies from scamming consumers even more than they do already.
Just call it "milk replacement", or ingredient + "milk" like in "oat milk".
Btw, I prefer powdered fermented oats as milk replacement because it has a subtle sweetness and tastes great in coffee. If you didn't try that before, give it a chance.