Issues adding existing listing to new marketplace

I sell my products both on Amazon AU and Amazon US and am in the process of listing my new products. So far I have created my listings on my AU seller central account from which I will then add to the US seller account via the “Offers” tab and adding in a US price.

In the past, I’ve experienced glitches where the listing won’t populate in my other marketplace but after trying a few times, it eventually goes through. However this time, I’ve been trying for a week now without success. Surely there is an easier way to do this without me having to check back to see if it’s gone through?