I see three White Series products on their site now:
- The White Series dimmer, formerly known as the 2-in-1 switch
- Product page: Inovelli White Series 2-1 Smart Switch • Works With HomeKit • Matter
- Community thread: Thread 2-1 Switch (On/Off & Dimmer) | Project Jonagold (White Series)
- Similar to the existing Red Series VZW31-SN and (especially) Blue Series VZM31-SN, just Thread instead of Z-Wave or Zigbee – can be set to “dimmer” or “on/off” mode (i.e., “2-in-1”), but even in on/off mode is not compatible with certain loads like a true switch could be
- The White Series fan switch
Product page: White Series (Thread/Matter) - Smart Fan Switch – Inovelli- Community thread: Zigbee On/Off Switch | Project Vernacular
- A speed controller for fans that can also do on/off, similar to the existing VZM35-SN, just Thread instead of Zigbee
- The White Series on/off switch
- Product page: White Series (Thread/Matter) - Smart On/Off Switch – Inovelli
- Community thread: Thread / Matter On/Off Switch | Project Vernacular [EDIT: corrected link, sorry!]
- Presumably similar to the planned Zigbee on/off switch, except Thread
- Seemingly the newest idea/announcement of all three (and unlike the others, no similar current-gen Red or Blue Series analog in the wild yet, either)
The community threads linked to above will probably answer more than I can recall from any project off the top of my head (they have a lot going on now!) or possibly even by refreshing my memory from any. 