Right now, the feature is limited to the Galaxy S24 series, running on OneUI 6.1 based on
Android 14 OS, and the same is likely to be made available for older smartphones in the coming days.
...
Call recording in VoWiFi mode is said to be available on Galaxy smartphones with the latest dialer app with version number
15.1.66 or newer. Not just VoWiFi calls, Galaxy smartphones can also record calls made over VoLTE (4G) and VoNR (5G) networks.