Unable to add block Spacing/Gap UI control to ‘core/columns’ block

Hi there,

For the ‘core/columns’ block, I would like to set the gap spacing between the columns.
In the theme.json file, I have added these codes below which I thought will add the Block Spacing/Gap UI control to the ‘core/columns’ block:

"spacing": {
"blockGap": true
}

AND

"blocks": {
      "core/columns":{
        "spacing": {
         "blockGap": true,
         "margin": true,
         "padding": true
        }
      }
    }

Adding those didn’t work. Is there a way to enable block spacing/gap to the ‘core/columns’ block?

Thanks!