Hello @darrenbachan .
You can use any custom post field generated by ACF plugin in URL permalink structure thanks to the plugin:
https://github.com/athlan/wordpress-custom-fields-permalink-plugin/
Moreover, you can create dynamic values based on that fields:
https://github.com/athlan/wordpress-custom-fields-permalink-plugin/wiki/ACF-plugin-support
Cheers,
Athlan.