Bluetooth Mesh stack is already utilizing setting layer (#FCB) to store mesh related data on SoC flash. Need examples so that its implementation along with Bluetooth Mesh sample code would not impact Mesh's persistent data ?
You should be able to use the same settings storage for your own data as well. The Bluetooth stack (Mesh included) uses the prefix "bt/" for all key names stored in settings, so as long as you use something else for your own data there shouldn't be any risk of conflicts.