We recently moved our Wi-Fi management to Sophos Central and configured WPA2 Enterprise authentication too. Everything seems to work well, except that we are unable to see user records under "Live Users" on the Sophos Firewall. Is this by design or am I missing something?
You need Radius Accounting. This is a separate Feature and needs to have Radius Account to work. The AP needs to support this feature (APX does). And then the Radius Server will send a Accounting packet to the firewall.