I can't find any obvious way to register my Tapo security cameras or TP-Link DECO X-50 Mesh modems.

I'm in Australia, and when I go to the TP-Link 'How to register a product' web page,

I get a pop-up saying 'From Australia? Get products, events and services for your region.'

and a link button.

But when I click the button it just takes me to a dead-end page with the message

'Oops! The page you're looking for can't be found.'

Any advice on this is appreciated.