Embedded Layout not showing the microphone button in iphone (ios)


We are using the rocketchat embedded URL to add chat to our applications android and ios
the controls that we need are upload image, record video, record audio
images and videos are working fine
the problem is the layout in the iphone is not showing the microphone button
in the android it is working fine
can anyone tell me what is the reason?

Server Setup Information

  • Version of Rocket.Chat Server: 2.4.0
  • Operating System: linux
  • Deployment Method: tar
  • Number of Running Instances: 1
  • DB Replicaset Oplog: Enabled
  • NodeJS Version: v8.17.0
  • MongoDB Version: 4.0.14
  • Proxy:
  • Firewalls involved:

Any additional Information