Can I connect a Wiser Relay (CCTFR6001) to a Wiser Gateway CCTFR6901G2 when one relay is already installed?

[Noctural]

Hello,
I currently have a Wiser Gateway (model CCTFR6901G2) installed, along with its existing heating control setup.
I would like to add an additional Wiser Relay (CCTFR6001) to the same system in order to control a second independent heating device.

Before purchasing the module, I would like to confirm the following:

1. Can the CCTFR6901G2 gateway pair with more than one relay (CCTFR6001) simultaneously?

2. Does the Wiser Home app support managing two separate boiler/heat-source relays within a single installation?

3. Are there any technical limitations or unsupported configurations when using multiple boiler relays with the same gateway?

I looked through the available documentation but couldn’t find a clear answer on whether this setup is officially supported.

Thank you in advance for your help and clarification.