Honeywell EvoHome system with 10 x HR91/HR92 TRVs

I've read this very helpful, but now closed post re. EvoHome, but am having issues.
Honeywell Evohome - :bellhop_bell: Get Help - Hubitat

I have the zone based HR91/HR92 EvoHome solution and am in the UK (so using the International cloud service).

I'm struggling to get visibility/control of my zones. Looking at the aforementioned post I can see more than one custom driver so I'm not even sure if I'm using the correct one. I'm using the "Total Comfort API C (csteele)" one.

If I look in the logs I can see a successful connection to the cloud but I'm not seeing anything within Hubitat (i.e. no Current States).

Any help/guidance appreciated.