Detect inactive ps4 account?

Hello me and a friend used to always play together with a rendom and now it's about a year no longer he no longer reacts to messages or friend requests from my 2acc does anyone know whether he has deleted his account or his ps4 is broken?

Do you even understand how an account or login system works? Besides, how is the PSN supposed to know if the PS4 of your random is broken? If this were the case, then logically she would not be able to establish contact.