Transfer PJSIP with headers


I have an environment where I execute transfers to a SIP URI under this scheme: same = n, Transfer (PJSIP / XXXX @ IP)
However, I need to pass a piece of data in that transfer so that when it reaches the agent it can already identify the calling user.
I read in this article that you cannot add headers in a transfer: PJSIP Transfer with Headers

Is this limitation still in place? is there any other way to send data in a transferred call?

There is still no support for such a thing. You can’t attach anything to the REFER or the 302.

Thank you very much for the reply!