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Hi Nik! Google's local results depend entirely on having a physical location in a specific city. Right now, you have a physical location in Sydney, so you're doing well for these Sydney-based-or-related searches. But, you don't have an office in Perth or Melbourne, so there is no reason for Google to rank  you locally for these cities. Simply stating in your Google My Business description or service radius that you deliver nationwide is not going to override Google's bias toward physical location. So, what this leaves you with is working to earn organic rankings for terms that relate to these other cities, and the main struggle here will be determine if it's logical for you to do so and then discovering content topics that make sense for the effort. Creating a bunch of pages that say 'we deliver to Perth', 'we deliver to Melbourne' will not be enough. It's not interesting and not a good reason to create a page. So, rather, you might need to think in terms of customer testimonials, stories about customers' use of your product, if you install your product then maybe video/text coverage of your installation projects, showcases of gardens in the different cities featuring your mirrors, contests in the cities, etc. You'll need to find reason for writing about these cities beyond simply delivering to them. Then, you'll likely need to earn some good links to these pages. And, hopefully, that will lead to some organic visibility for these other cities where you lack a physical location. Hope this helps!