accessible apps for controlling underfloor heating

Hi,
I'm looking for an accessible app that can control underfloor heating systems. I've been told that Hive, Honeywell and Nest don't do underfloor heating apps. So, are there any out there that work with VoiceOver? I know Heatmiser works with Apple Home. But is there anything else that works with VoiceOver? I've been told a lot of these apps don't work with Apple Home. But maybe something will work with Google Assistant or Alexa? I've got both those apps on my phone. Any advice is much appreciated.