Only a little bit. This is quite incredible. I can imagine that doing it near population centers would be almost impossible.

Of course; it’s a remarkable feat either way.

If that population center happens to be Iceland, just walk over to the Mid-Atlantic Ridge and hold a radio on each side. That is equally valid for "trans-Atlantic".

The first transatlantic flight (Alcock and Brown) went from an island to an island. Lindbergh's famous New York to Paris flight left not from New York City (which is mostly on islands) but from Long Island.

Yes, but these islands are a lot further from the land on either side of the ocean. When you look at the map it looks less impressive than Alcock and Brown.

But in fact this 432 MHz contact is over a greater distance, 3867 km, than Alcock and Brown's flight of 3040 km (https://en.wikipedia.org/wiki/Transatlantic_flight_of_Alcock...)

So calling it trans-Atlantic actually undersells it in comparison with other well known trans-Atlantic feats while at the same time setting people up to think the opposite.