Thank you @Sudip Mahanta. your post saved me from continuing my 2 days of debugging hell.

Here's what I ended up with:

static const androidPermissions = [
    Permission.bluetoothScan,
    Permission.bluetoothConnect,
    Permission.bluetoothAdvertise,
  ];

  static const iosPermissions = [
    Permission.bluetooth,
  ];

  /// Gets the required permissions based on the platform.
  static List<Permission> get requiredPermissions {
    if (Platform.isIOS) {
      return iosPermissions;
    } else {
      return androidPermissions;
    }
  }