Wiring 2 gang switch with extra one gang to control another device

Configuration Zigbee
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1

Hi there.
I have a 2 gang switch at home with no neutral wire. Can I use a 3 gang ZigBee switch with the one extra gang? I can wire only two gangs. Can I use the third gang to control another ZigBee device?

I was looking at this switch: 3 gang, no neutral

2

I have just same question like you. Did you tried this switch?