Integrating a thermostat that can handle modern condensing furnace with additional domestic hot water

Anyone has a setup at home with a modulating weather dependant control for a combining condensing furnace with domestic hot-water heating through opentherm? :sweat:
I’ve been looking at smart hubs but can’t seem to get passed the heater part.
The ST hub looks the most promising but alas, I only read about things like the evo home being in the dark for years and on/off thermostats that make my furnace useless.
I read about the zone directors but that’s just 1 part of the control.
I still need to control the temperature of the water if I want my furnace to be efficient.