Same here, I have one a week old and no sign of it. He double-checked with his OA and they said it should be in there, so I will keep waiting. I thought they goofed and I would lose my first ever ref. Glad to hear it's not just me. Now just 4 more to go to the 22s and a powerwall.
From the Tesla Referal Page FAQ:
“I am a current owner of a Model 3 Performance. Will I be eligible for free, unlimited Supercharging?
Yes. Existing Model 3 Performance owners will receive free, unlimited Supercharging. Please allow three weeks for the change to be applied to your vehicle account. Existing Model 3 Performance owners will also be able to offer free, unlimited Supercharging with to new Model S, Model X and Model 3 Performance orders.”
So it will take about 3 weeks