Switch homepage not using shortcodes

Hi,
I have a site that has content for two locations: Sydney and Melbourne. I am able to switch the content using pre-get posts and a cookie.

I’d like to auto switch the content if someone is in either of those cities, is there a way to access the city without needing the shortcode?

You can see the site here: http://eatdrinkplay.com

https://ww.wp.xz.cn/plugins/geoswitch/