On Apple silicon Mac running 11.4 when device lock is performed through MDM, the device is going to activation mode. Instead it should get locked. There were a few blogs where the issue is talked about but nothing concrete from Apple documentation. Please direct us to the right documentation on Device lock support for Apple Silicon.
Apple silicon device lock is not working for devices < 11.5
Hello, I’m not sure which blogs were reporting that this is expected behaviour but as you have observed this updated behaviour only became available in macOS 11.5 or later.
Documentation for this command is available here: https://developer.apple.com/documentation/devicemanagement/lock_a_device