I’d guess it’s similar to the 208, as both made by PSA.
To access accessories, press the start button without the foot brake on. You can then listen to the radio and have the heating on.
Preconditioning is done via the app. You can either set a time for the vehicle to be warm and ready to go. I believe this is about 21 degrees. Or you can launch the preconditioning and it will keep going until you get in the car and press the start button. In either case, unless you are plugged in, preconditioning only works while you have 50% SoC or more.