BLE gatt server modify advertising package

I used the sample “BluetoothServices” and I can add \ remove services

I need to modify two parameters that I could not find in the sample :

  1. Device Name (generic access 0x1800, uuid 0x2A00) - currentlly it’s BlueZ 5.52

  2. modifying the public name package, currentlly it’s the data published:

I would like to modify the “additional data” part