If the tech was so easy and America held all the cards, the machines would be made in America, end of story.
Yes it was developed by the US.
ASML also created the deals with Zeiss and other European companies which were critical in getting all the necessary components created to make EUV happen. None of this would have happened with Jos Benschop and Fred Bijkerk (in the Netherlands).
I agree that some research was done in Japan, Russia, and the US, but this is the case for basically every technology, it's never the case that only one country is responsible solely for something. I'm pointing out (correctly), that ASML kicked ass with EUV tech in a way that no other company did, including Intel, which shows they have something that no other company has. Again, if it was so easy, why isn't an American company making those machines which are critical for the entire worlds security and productivity?
The US could have sold the EUV tech to Canon or Nikon and the Japanese would have owned the EUV industry, but the Dutch ASML played the political game better and won the deal but selling US tech doesn't make it an EU innovation.
And you can't compare licensed or bought tech to individual contributions from indvidual persons.
The US still owns the EUV tech ASML is using and has veto rights on what it can do with it and who it can sell it too. ASML would love to sell EUV steppers to China and make bank since China is desperate to ramp up its domestic fab industry, but US says "NO" and it must comply. The NL or the EU didn't veto the sale, the US did, and ASML complied because the US Gov have ASML by the balls since it's now also partly a US company monetizing US tech.