const UndiciTLSDispatcher = require('undici-tls-dispatcher')
const dispatcher = new UndiciTLSDispatcher({
  tlsConfig: [
    {
      url: 'https://yourserver.com',
      tls: {
        ca: '...'
        cert: '...'
        key: '...'
      }
    }
  ]
})

const res = await request(httpsServerUrl, { dispatcher })
...