I just received the following statement from the moderator of the Samsung Developer forum:
Samsung next line of Smart Watches will run on a Unified Platform that uses some Tizen and some Wear OS technology. It will not be the current WearOS.
This sounds like the firmware for the next series of Samsung smart watches will be some sort of hybrid combining parts of both Tizen and Wear OS. I understand Facer already supports WearOS, but will it be able to support the new Samsung software - whatever it is called? My sense is that the answer is no.