"Except the Koreans, Japanese and Australians."
They're all 300-4500 kms away and not even the most gungho LM fan reckons an F-35 can make those distances. Plus I doubt the Singaporean's worry about them.
Their priorities are Malaysia, Indonesia and maybe Thailand - I don't think they want to get into a face-off with China
Buying the B model not only gives them dispersal options but also allows them to cross-operate with a range of other navies if they want to.