Does you MIcra have Apple CarPlay and Android Auto?
I bought mine on March 2019 and I was told by Nissan that Nissan connected services are grayed out on the infotainment system because my system has these two services instead of Nissan connected services. According to them, there are two types of infotainment systems, the older ones only with Nissan Connect and the newer one, only with CarPlay and Android Auto. For that reason the "Vehicle" tab is dimmed and I can't also use the Nissan Connect smartphone app to put some apps on the infotainment system like facebook and others.