Summarizing comments/notes at a parent level in Narrative reporting

Hello Experts,

I'm trying to build a summary variance flux report which will pull the parent accounts and pulls the commentary/notes from a detailed flux analysis report. Users input the flux commentary at the lowest account level in the detailed report and want to pull the commentary from the lowest account levels and display it at the parent account level in the summary report. Is there a functionality to do this Narrative reporting /Reports?

Things I tried -

Used the Named POV method to pull the commentary from the same entity ( entity is in POV) and used the notes text function in the summary report. This works for pulling the notes for the entity at the summary level but it doesn't filter on account (on rows), so irrespective of any parent account that I pull, this is displaying all the comments across all base level accounts.