Unable to connect to Wi-Fi despite troubleshooting on MacBook Pro

If you have tried everything in:

If your Mac isn't connecting to the internet over Wi-Fi - Apple Support

I would advice to contact apple, to see if there is any additional troubleshooting they advice, or arrange service.

Contact Apple for support and service - Apple Support

Private WiFi Address (MAC Address) has three Options:

• Off: Disables the use of a private Wi-Fi address. Your device will use its default (permanent) MAC address when connecting to Wi-Fi networks.
• Fixed: Your device uses one consistent private MAC address for a particular Wi-Fi network. Once your device generates this private MAC address, it will reuse the same one for that network every time you connect.
• Rotating: Your device frequently changes its private MAC address when connecting to the same Wi-Fi network, providing the highest level of privacy. This makes it nearly impossible for the network or observers to track your device over time.

Mac: MAC address

iPhone: MAC address

Possible Fixes:

1. Disable Private Wi-Fi Address:
   1. Go to Settings > Wi-Fi, tap on your work network, and turn off Private Wi-Fi Address.
   2. Since you’ve whitelisted a specific MAC address, make sure the phone is using the correct one.
2. Turn Off Wi-Fi Assist:
   1. Go to Settings > Cellular > Wi-Fi Assist and toggle it off.
   2. Sometimes, this setting can interfere with connecting to hidden networks.
3. Ensure iPhone Saves the Network Properly:
   1. After manually entering the SSID and password, make sure Auto-Join is enabled.
   2. If the issue persists, try Reset Network Settings (Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings).
4. Ask IT to Consider Broadcasting the SSID: Hidden SSIDs do not add security and often cause connection instability. If possible, ask IT to broadcast the SSID but keep it secured via MAC filtering.