Superset HandleBar support for array time Column iteration

I have a requirements to create dynamic table on the basis of array type columns in my data. Both array type column have the same number of attributes.

Here Column D AND E which I pointed in my dataset are array type columns.

{{#each data}}<table><tr><th>REG</th><th>TYPE</th><th>STO</th>            {{#each D}}<th>{{this}}% </th>            {{/each}}</tr><tr><td>{{A}}</td><td>{{B}}</td><td>{{C}}</td>            {{#each E}}<td>{{this}}</td>            {{/each}}</tr></table>{{/each}}

I was expecting it create dynamic header in table HTML attribute, but it did not create anything, if I just reference D and E, it shows be array data in square bracket.