Apple CarPlay FULL SCREEN

[Alec01]

Thanks, I have already upgraded the maps to the latest version (was of last week) Europe EVO 2921-2 NBTevo_M17365I

Your map version (NBTevo_M17365I) indicates that you have a version older than 18.03. Hence CarPlay fullscreen is not possible.
You need a minimum of NBTevo_N17365I which corresponds to 18.03.

Now the solution is to flash your NBT Evo using PSdZData Full version 18.03 (which is v.4.11.20 or v.4.13.11). (The meaning of 18.03 is that it's a version that has been released on March 2018).
Or even you can flash it with latest PSdZData Full (such as v.4.31.12), released few weeks ago.

You can find in the forum the guide (How to perform iSTEP UPDATES on NBTEVO.pdf) on how to flash the HU, and also the links to download latest PSdZData Full.

Flashing an ecu is always a risky operation, hence you need to be carefull before doing it.