Pjsip trunk & did incoming number setup

I’m aware that using chan_sip it works by sending the register string user:pass@server/IncomingDidNumberXXXXXX but how does it work with PJSip since my Sip provider doesnt return DID? I have tried to enter the DID but DID is blank in the CDR settings no matter what I try.

Is there a setting to force DID on Pjsip?