Dear Stefano Della Valle,
Hope you are doing great, the NTAG 215 is not part of the DNA family the NTAG DNA are the 413, 424 and 424 TT.I am not aware of the 215 being a DNA and supporting SUN and AES features, if you meant the 413 or 424, the documentation is available in Docstore, you should sign an NDA (Non Disclosure Agreement), if you do not have NDA create an internal ticket Support|NXP so you get help to sign an NDA and then get access to the documentation. please check the examples in Features and Hints for 413.

BR
Jonathan