According to the product page - https://www.mobvoi.com/pages/ticwatchse - the watch is now shipping with Wear OS by Google.
So it would seem that the OTA hasn't been released, by the devices are ready for the update.
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This was updated yesterday: https://support.google.com/androidwear/ ... 5693?hl=en. It shows the TicWatch in the "Watches that are currently pursuing the Android Wear Oreo (8.0) update" section. Hopefully this means soon!