I'd like to source the value of s.pageName within an Event rule, custom condition rule. Is it possible in any way????
Thanks for reaching out to Adobe Community.
Please go through the below mentioned doc to see an example of the event based rules:
You can consider creating a data element which captures the value of this variable.
This data element can be referenced in your event based rule or custom code.
Here's some documentation on data elements for your reference.
Feel free to revert in case you have further queries.