Unable to get plugin t work

I added the following to module.exports:

shells: [
  {
    name: "Linux",
    group: [
      {
        name: "Ubuntu 20.04",
        shell: 'wsl.exe',
        args: ['--login'],
        default: true,
      },
      {
        name: "CentOS 7",
        shell: 'wsl.exe -d CentOS7',
        args: ['--login'],
      },
      {
        name: "NewishUbu",
        shell: 'wsl.exe -d NewishUbu',
        args: ['--login'],
      },
      {
        name: "OldUbu",
        shell: 'wsl.exe -d OldUbu',
        args: ['--login'],
      },
    ],
  },
  {
    name: "Windows",
    group: [
      {
        name: "Powershell 7",
        shell: "pwsh.exe",
      },
      {
        name: "Powershell",
        shell: "powershell.exe",
      },
      {
        name: "CMD",
        shell: 'cmd.exe',
        args: ['--login'],
      },
    ],
  },
],

However, I only see default in my shell select list. What am I doing wrong here?