I would like to make an alternative text in a hyperlink column bigger.

In a title column, it works fine with this code:

    {
      "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
      "elmType": "a",
      "txtContent": "@currentField",
      "style": {
        "font-size": "13pt"
      }
    }
But when I paste this into hyperlink column, it does nothing or the column is broken.

**My hypothesis is that the elmType is set wrong.**

Anyone know how to solve it?
Thanks.