Actually they have been available there since Saturday. Sorry for the late news, my bad. Anyway, HTC has recently released three new smartphones: HTC U11 Life, U11 Plus and U11 Eyes. Unfortunately for the American customers, only Life is officially available in the US. Fortunately for the American customers, they can get Plus or Eyes anyway! All they need to do is order one via Amazon. Of course there are downsides: phones’ prices are larger than if they were sold officially ($826 for U11 Plus and $614 for U11 Eyes), they do not have an US warranty and, perhaps most importantly, they do not work on CDMA/LTE carriers, so no Sprint or Verizon for you; they will work on T-Mobile (LTE only) and AT&T (LTE + 3G).
So yes, there are quite a few backdraws to getting yourself one of these phones in the US. Specs wise, HTC U11+ is the high-end one of the two phones, with 6′, 1440 x 2880p display, Snapdragon 835 CPU and 6GB RAM. HTC U11 Eyes, on the other hand, is a mid-ranger, sporting a 6′, 1080 x 2160p display, Snapdragon 652 CPU and 4GB RAM.