5G NAS Decode

When using Wireshark for NGAP protocol analysis in 5G, by default the NAS messages are encrypted and so you cannot view parts of them, even when using Null Encryption ciphering (EA0). In order to read them, head to Edit | Preferences | Protocols scroll down to NAS-5GS and select the check box to decode.

and now you should be able to read all the detail in the NAS layer, assuming EA0 ciphering is used.