US customers seeking anything other than an Apple Watch SE may find it difficult, as the Apple Watch Series 9 and Apple Watch Ultra 2 are no longer being imported until further notice.
A patent lawsuit from Masimo led the United States International Trade Commission to recommend an import ban on infringing Apple Watch models. That means Apple had to halt import of the Apple Watch Series 9 and Apple Watch Ultra 2 since they are the only new models sold with blood oxygen sensors.
Apple hopes a software update will be enough to satisfy customs and enable the import of Apple Watches in the meantime as it appeals the patent lawsuit. Another probable option is settling with Masimo, though it seems Apple has avoided approaching that so far.