Page URL report

If you are not already capturing url on a custom variable, then the only way url would be available to you in Workspace Analysis would be if you page report is defaulting to urls, which will only happen if pagename is not set by your implementation. 

So first, I'd check what your page report looks like, if you are not seeing urls, then you may want to consider capturing the url with the blow recommended process:

https://experienceleague.adobe.com/docs/analytics/components/dimensions/page-url.html?lang=en

Populate an eVar with URL

Adobe recommends setting an eVar to the concatenated string window.location.hostname + window.location.pathname. This string typically works better than window.location.href because it omits protocol, query strings, and anchor tags.

If you want the eVar to exactly match the ‘Page URL’ dimension in Data Warehouse, you can use dynamic variables and set the eVar to D=g on each hit.

Please be aware that page urls often have a lot of unique values if you include your query string parameters, in which case you may run into hash collisions https://experienceleague.adobe.com/docs/analytics/implementation/validate/hash-collisions.html?lang=en