Number of diverter valves tado extension kit can manage?

Options

I have installed the tado extension kit and it’s working well. I would like to add three diverter valves - currently the system has none.

  1. Hot water
  2. Annex (7 Tado TRVs)
  3. Main house (16 TRVs)

Is this possible? If not, what would be the work around?

Currently the annex and main house is all connected to one tado wired thermostat.

Thanks