Hi,
The JSPUI statistics page you are referencing is the "Log-based" statistical reports that came with 6.x and below. These reports were generated by parsing the DSpace log files and generating an HTML report from them.
Unfortunately, those log-based reports are not yet implemented for 7.x, but they are listed as #9 in "Tier 3: Medium Priority" in our 7.x Roadmap:
https://wiki.lyrasis.org/display/DSPACE/DSpace+Release+7.0+Status#DSpaceRelease7.0Status-Tier3:MediumPriority
For the upcoming 7.5 release (due in Feb 2023), we are planning to work on remaining tasks in Tier 2 and some of the tasks in Tier 3. I'm not yet sure whether this task will be included in 7.5, or if it'll be more likely in 7.6 (due likely in June 2023). But, it is on our roadmap, so it is planning to be in one of our upcoming 7.x releases. It's just a matter of how quickly we'll get to it.
If you are interested in seeing this feature get built sooner, we do welcome code contributions from anyone. Or, you can potentially hire one of our Registered Service Providers to build the feature earlier & give it back to the community:
https://dspace.lyrasis.org/rsp/
Tim