I think the information on Info-Pass is outdated.
https://my.uscis.gov/en/appointment/v2
This states :
Scheduling An Appointment
Inside the United States
If you are inside the United States, you can no longer schedule an appointment online using InfoPass for domestic offices. However, you can check your case status, see our case processing times, change your address, and use other tools on our website.
If our online tools do not provide the help you need, please call the USCIS Contact Center to request an appointment.
If you are in Guam or Saipan, you may either call the Contact Center or send us a message to schedule an appointment.