How can I test my server with an Australian web client?

I have an app running on a web server in the Heroku cloud. The server is in Ireland. The client is written using React.

Users from Australia (working with Windows/Firefox) report bugs that are seemingly caused by the long network delays (more than 500 milliseconds from Australia to Ireland!).

How can I rent a client computer in Australia so that I can connect to it via screen sharing, run a browser there and see for myself what happens when I use the app in Ireland?

Is there a cloud service in Australia that offers simple Windows boxes with remote desktop access?