This article explains how users can show statistics of the total story point of nonclosed and closed status based on Epics.
\uD83D\uDCD8 Instructions
Navigate to Jira Menu → AIO Reports → My Area → My Calculated Fields.
Click Create New Field to create a new calculated field.
Configure the calculated field as below
Create a report as below to show the total story points of issues in Epics by closed and nonclosed status.
You need proper permission to create Calculated field