We'd like to add a custom field value to the built status field as described in this article:
https://support.freshservice.com/support/solutions/articles/156452-customizing-helpdesk
Once setup, we'd like to have the supervisor automatically change the status of the ticket after a certain amount of time has passed since the status was set to our custom value. Currently you can chose "Hours since... (status)" but the custom values in the status list don't appear.

