Getting sound from my new Mac mini m4 from the HDMI port to Sonos Beam 2 soundbar

Hi, just bought a Mac mini m4, and want to use it with a Sonos Beam 2. When using airplay I get a lag when watching movies. If I try to connect with a cable to the HDMI port om my Beam 2, I dont get the choice to use HDMI out as sound on the Mac mini. Anyone else having the same problem? Does anyone know if it is possible to get only sound out from the HDMI on the new Mac mini... Is there a workaround anyone knows about, or how to remove the lag with airplay?