There's actually an M&Ms store in London too. https://www.mms.com/en-gb/explore/mms-stores/london

Yup, they exist in several places, in several countries

I remember seeing one in Liverpool (though pre-Covid)

Wow, others.

Let's see... there's one in Frisco, Texas ("Dallas"); one in Long Island ("New York City"); one in Houston; and one in Los Angeles.

That's almost 1.5% of the number of Apple Stores in the US. The difference is that Apple uses their stores to sell things.

This is obviously not a method by which you'd be expected to buy a Samsung product. Or, in most cases, a method by which doing so would be possible at all.

I'd apologize for the oversight, but my sweeping generalization is more accurate than the detail that Samsung Stores technically exist.

The poster was mentioning London - there are 4 Samsung stores in London. That's more than "technically existing", no?