I expect this to be an issue way down your list of priorities, but I’ve made an adapter to add Ant+ to my aging Tacx Flow (the yellow one, T1901) which came without a usb or ant+ computer.
It works fine with the likes of Zwift, pairs and is able to transmit power and receives requests to control the resistance of the magnetic braking unit.
When using with VirtuGO it gets detected and pairs fine, power is picked up but it never gets any resistance request data. When pairing I see that the software requests the fe-c capabilities which is responded to correctly. But when actually riding, resistance never changes, the software never sends any resistance data to the trainer. During riding it only ever receives the oocasional DataPage55 packet which is user configuration data.
Does VirtuGO only work with known devices? On looking at the data from the Zwift software, it never asks for any capabilities information (which it should) and just blindly sends gradient requests whether or not the device says it supports simulation mode rather that just basic resistance. This is probably not strictly compliant with the Ant+ protocol and just trying to be as compatible as possible.
I appreciate this is really not a priority issue!