Put a multi action to run commands
pactl set-default-sink "alsa_output.usb-HP__Inc_HyperX_Cloud_III_S_Wireless_C1V53704T0-00.analog-stereo"
pactl set-default-sink "alsa_output.pci-0000_09_00.1.hdmi-stereo-extra1"
When I click to toggle to headphones it goes to headphones for a second but goes back to the speakers