Heresy mounts its head:

In the US, you can buy canned¹ clam chowder with or without milk.

Look for "Manhattan clam chowder" or "New England clam chowder."

You might even be able to look up the two variant names, but I haven't cared enough to inquire.

¹ This is the "heresy" part, just in case it wasn't obvious to anyone.

A few restaurants "back east" some years ago even had a choice of the two kinds on their menus. They always sort of apologized for the "without milk" kind, and explained it was for "furiners who din't know no better." (Recollection is that it had 'maters in it(?))

John