Not needed. It's the OG product which dominates the market since literally more than 10 thousand years. Everyone knows what it is and what to expect from it. You will not find a more established product in the west.
Laws aren't made just to make laws. They need a reason.

And the moment, milk replacements stop being sold with absolutely insane markups, the OG product will become a niche item anyway. Then it will be marketed to an aging demographic which is too accustomed to its taste to switch with slogans like "Real cow milk like in the good old times". You don't need to force a name change. It will happen automatically as the market switches to replacements.