Getting Switcher integration to work with Switcher devices in Guest network

I’m trying to make this integration work while these devices are on a guest network - Switcher - Home Assistant
I’ve installed Yazfi on my Asuswrt-merlin router and have enabled one way to guest. I’ve confirmed that HA is able to communicate with other IoT devices on that network, devices that weren’t discovered before guest communication was permitted.
However, Switcher devices are not detected by HA.
I’ve confirmed that HA is able to interface with them by temporarily moving one of them to the regular 2.4 WLAN and it worked fine.
I’ve also enabled two way to guest but they still don’t get detected
How is that integration discovering devices? What FW changes should I make if any? Any ideas on how to make it work would be appreciated.