Finally got one as well 
Since the SoC is quite similar to Raspberry Pi 3, I read that Raspberry Pi 3 device tree works, it its own device tree though. So I downloaded the rpi3-64 7.0.rc1 HAOS image, then coping bcm2710-rpi-3-b.dtb and naming it bcm2710-rpi-zero-2.dtb on the first FAT partition of the SD card, and lo and behold, HAOS booted 
In my quick test I setup WiFi using nmcli did work, but I could only see 2.4GHz WiFi networks, so I guess there is a firmware update or something similar required.
Currently there seem to be no official Raspberry Linux kernel tag with Zero 2 W support, but they did work on adding Raspberry Pi Zero 2 W support already, so the next release should be ready for it. We鈥檒l see.