Could you provide more information please? What headphones do you use? Are they compatible with Dolby Atmos or other surround sound systems?
I can only guess that once you have installled the JBL Quantum software, windows will then give you the option to use this as your 'multi channel sound driver' and then running Beam would automatically be in surround as it is simply using the windows sound settings. That's in principle how it 'should' work.