The HR Monitor example is BT SIG approved UUID and can be displayed as such.
The LightBlue App shows the UUID as a feature of the App itself.
The display of Vendor Specific Services and Characteristics can be done when you develop your iOS App similar to Light Blue and define your specific UUID in the XCode of your App.
Thanks you j.t. I would like to send a simple piece of data from my Bluetooth module to my characteristic, what would be the best example to investigate or do you have any tips?
Try looking at the hello_sensor app for Vendor Specific Characteristics example