Knowing that en-GB is coming, but technically you cannot predict...

Knowing that en-GB is coming, but technically you cannot predict a new site's coming by testing the site with a new sub folder (i.e /en-GB), it is just how this site behave natually. same as https://www.afterpay.com/en-CA/index and https://www.afterpay.com/fr-FR/index still render the home page on the language you previously visited. it looks like a fallback approach instead of showing 404 page. that does not mean Canadian or French are coming. The only one I can think of indicaiting a new site is coming is from the language dropdown at the footer secion. Let's be patient until the 26th.