Google Cast not finding google devices

Home Assistant Virtual Machine and Google devices all on the same IoT Vlan. Google cast integration can’t find the google devices, half dozen of them some minis, a hub, and a few CC Audios.

PC hosting the VM is dual networked to both the Iot Vlan and the Trusted Vlan. HA VM is bridged through the IoT Vlan network link, and it has its own ip on the Vlan, doesn’t share with the host.

My phone on the trusted network can see and interact with them.
Laptop and PCs in the trusted network can see them.
So mDNS on my ubiquity gear is working.

What could be preventing HA from seeing the cast devices?

Host machine is Win10.