Custom alignment in richText cells Exceljs

"exceljs": "^3.9.0"

I need to create a spreadsheet with cells that have 2 different values that looks like this. First value needs to be aligned left and second value needs to be aligned right.

My result right now is:

Here is my richText for the cells without "/"

    [
  {
    "font": {
      "size": 8,
      "name": "Arial"
    },
    "alignment": {
      "vertical": "middle",
      "horizontal": "distributed"
    },
    "text": "392.3 "
  },
  {
    "font": {
      "color": {
        "argb": "00c90a00"
      },
      "size": 8,
      "name": "Arial"
    },
    "alignment": {
      "vertical": "middle",
      "horizontal": "distributed"
    },
    "text": " -10%"
  }
]

And richText for cell with "/"

    [
  {
    "font": {
      "size": 8,
      "name": "Arial"
    },
    "alignment": {
      "vertical": "middle",
      "horizontal": "distributed"
    },
    "text": "392.3 "
  },
  {
    "font": {
      "size": 8,
      "name": "Arial"
    },
    "alignment": {
      "vertical": "middle",
      "horizontal": "distributed"
    },
    "text": " / "
  },
  {
    "font": {
      "color": {
        "argb": "00c90a00"
      },
      "size": 8,
      "name": "Arial"
    },
    "alignment": {
      "vertical": "middle",
      "horizontal": "distributed"
    },
    "text": " -10%"
  }
]

Is it possible to do what the first screenshot looks like?

from Custom alignment in richText cells Exceljs