Can't hear sound with android webview(iframe api)

A and B in meeting.
A use android app(webview + jitsi iframe api), B use web browser(jitsi iframe api too)
A can’t hear B, B can hear A

in AndroidManifest.xml:

  <uses-permission android:name="android.permission.CAMERA" />
  <uses-permission android:name="android.permission.READ_PHONE_STATE" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.RECORD_AUDIO" />
  <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
  <uses-permission android:name="android.permission.FLASHLIGHT" />

in activity:

override fun onPermissionRequest(request: PermissionRequest) {
      Log.d(TAG, "onPermissionRequest: url=${request.origin}, perms=" + Arrays.toString(request.resources))
      request.grant(request.resources)
    }