I'm the East Bay and originally tried to schedule through the app's Service Appointment. It was cancelled with the message that the computer wasn't available and that I will be contacted. Having experienced that message before with my September 2018 Performance and never getting my spoiler until I kept requesting it, I just kept trying.I got my car December 2018 with EAP and paid for FSD in March of 2019 during that $2000 sale. I have yet to be contacted by anyone to retrofit to HW3. I guess I'm not in a rush.
Finally, I tried booking with the Berkeley Service Center and one of the advisors seemed to take it to task to get it done. He ordered the computer but it took a couple of weeks. Had it done last Thursday (plus the charger pin replacements).
I recommend to just keep booking a service appointment and letting them cancel it. Based on history, it's very unlikely you will be proactively contacted. Being in the Bay Area probably helps.