Remote debugging in PHPStorm?

I'm trying to get a simple PHP remote debug in PHPStorm 2022.2.3 up and running but nothing is happening. Here's what I've done:

1. In Run/Debug Configurations I've set up a ‘PHP Remote Debug’ configuration.
2. I've left ‘Filter debug connection by IDE key’ unchecked
3. I've gone through the steps in Pre-Configuration including Validating the debugger configuration on the web server AND installing the Chrome extension
4. Set a breakpoint in my PHP file locally.
5. Started the remote debug run configuration
6. Visited my remote php file at https://staging.4x4tyres.co.uk/test.php in Chrome with ‘Debug’ activated in the extension toolbar

Nothing seems to happen, the PHP file just runs without breaking.

I'm obviously doing something wrong, do I need to do some configuration on my router to port forward traffic to port 9003 to my Mac for example on my local network?

Any help appreciated, thanks