Thanks for reaching out to the Roku Community!
We're so sorry to hear about the experience and We will work with you to know what went wrong so we can assist you further and fix the issue with your Roku mobile app that is missing the headphone icon.
Can you please provide us with the following information:
- Roku device model, serial number, device ID, and software OS/version (these can all be found in Settings > System > About)
- the mobile device brand, model, and OS, as well as the Roku mobile app version
We look forward to hearing from you and assisting you further with this issue. Thank you!