Could be but almowt no one use Eurasia ss Continent. And if we use The cultural definition of continent most people use América, With his sub-continents of North and south América, In fact The only place I know that use The definition of "Americas" With the continent of North and South América Is the USA
It's the whole Anglophone world at least, not just the US (well I can speak definitely for the UK and I'm pretty sure about Canada, Australia and India).
Culturally it's an awkward one, you've got one definitely culturally united block in South America (the Guyanas and Suriname not withstanding), you've got Canada and the U.S. which are a long way from that for the most part, you've got Central America which is way closer to the south than the north and Mexico which is a bit of an inbetween (although the Mexicans I know may be particularly "estadounidenses" as most of them literally live on the border). And the Carribean which is all over the place.
In French the wiki talks about "Amérique" as a continent like the Spanish and Portuguese, and also uses "en américain" to describe the country like in English though "les États-Unis" is probably more common than "the United States" is in English. I can tell you that if I say américain and then talk about a Brazilian (or even a Quebecan) a French speaker will be pretty confused. The German wiki compromises and says "
Amerika ist ein Doppelkontinent" - I haven't translated but I'm guessing that means "double continent". Danish calls America a "landmass" and North and South continents. Moving on to ones I definitely need to translate, Chinese appears to distinguish between physical (North and South) and human (anglo- and Latin-) geography and doesn't have a word that translates directly to continent. Arabic describes the controversy and doesn't appear to commit to any side.
So given we can't even agree in OTL the OP should be pretty easy. I like India as a continent, and I think that should be easy in any TL where it isn't mostly united. I could see a Siberia or even an Arctica happening on a more climate level.