Actually, the idea for these devices, which are a bit like power strips, would be to make the integration split the device into several devices, and this for several interests:
- Be able to properly name each device
- Be able to place each device in a different room (since a relay can control devices in multiple rooms)
- That these devices are managed by voice assistants (Google Home, Alexa), which only manage one feature of the same type per device
This is how most other home automation systems work.
This is a development in the Zigbee2mqtt integration 