Xiaomi AX3600 support?

Any work on getting openWRT to work on this?

Very powerful device.

For official openwrt support, there has to be a target for the ipq8071 chipset first.
I think think this depends mostly on the support of the wifi part.
Currently there is no support for any wifi6 device/chip.

See this topic: Xiaomi’s upcoming AX3600 Wi-Fi 6 router is based on Qualcomm’s enterprise grade networking platform