Hello, 

Thank you for the provided detailed information.

The ChartSeriesItem does not have access to categories for generating the desired label. That's why we need to pass labels with the all information needed:

const labelsAriaContent = (e) =>
  `${e.series.name} in ${e.category} is ${e.value}`;
        <ChartSeriesItem
          key={idx}
          type="column"
          data={item.data}
          name={item.name}
          labels={{
            content: labelsAriaContent,
            visible: false,
          }}
        />

The `labelsAriaContent` template will be set as aria-label of the series point and the screen reader will announce it on focus. This can be seen in action in the following example:

• https://stackblitz.com/edit/react-kiqdrr-z5lagc?file=app%2Fapp.jsx 

Please review the implementation above and let me know in case further assistance is required.

Regards,
Ivaylo
Progress Telerik