BTT Octopus Max EZ V1.0

Should the RatOS configuration step pickup the Max EZ in DFU mode when been asked to flash via DFU? (I selected "Octopus Pro H723 V1.1" and it does not seem to connect)? Or does it look for some board "Signature" while in DFU mode?

I eventually flashed via SD card but would like to under if DFU would have worked.