I got good news to share, I got the Hilton Aspire Amex Card from US website.
Here is what I did.
I login in AU amex as usual, change the country to US at the bottom right, then apply for the card. After I clicked the apply button, I got a popup ask for my approval to use my AU profile details for the application, I agreed on this, then the application form is half filled, like name, email etc. All I need is to put my US mobile, address and annual income.
The confirmation page says they need to look into the application. Several hours later, I got email, card approved.
I have already setup my US Amex login from the confirmation email, added the card to my apple pay, all without received the card in snail mail.
Interesting, Amex did not request address check or other sort of subsequent validation? Did they indicate this constitutes a global transfer?