Anyone getting Dolby audio from JioFiber STB??

Tried HDMI and optical nothing works. When changing audio settings to manual mode and selecting Dolby no sound output

Dolby is heard on some content on 5.1 home theatre

Search on Google 'Amazon prime device compatibility'
Amazon provides 5.1 surround on some devices. They have mentioned Jio and the audio will be Stereo on it.

Jio STB has Optical Out ie SPDIF BUT no app on jio STB supports 5.1 playbacks not even Amazon prime or Hotstar the only way you can get 5.1 audio is thru the Photos app if u want to play multi-channel movie using SPDIF port the movie has to be DTS or Dolby Digital AC3 (NOT Dolby digital plus ie E-AAC) and currently only Photos app can play multi channel audio files or movies using Pen-Drive. no app such as hotstar or PrimeVideo has that support. trust me I have tried contacting PrimeVideo Support and jio Support all that they told me is that the H/W doesn't 🙁Support it and they cant provide any solution on this (see attached Photos of the conversation)amazon Support