Google has so far confirmed that only a handful of current and upcoming smartwatches will be upgradeable to Wear OS 3 later this year.
Wear OS 3.5 is here: features, supported watches and everything you need to know
You'll Need Wear OS 3 To Use The Smartwatch Music App
Wear OS by Google The smartwatch operating system that connects you to what matters most
First Xiaomi Wear OS 3 Smartwatch Might Debut This Year
State of Google Wear OS 3 in 2023: List of compatible smartwatches
Fossil: Fossil begins rolling out Wear OS 3 update for Gen 6 watches - Times of India
Mobvoi finally begins rollout of Wear OS 3 for TicWatch series (but did not provide any other details about the rollout, however) : r/WearOS
Fossil is finally launching Wear OS 3 for its smartwatches
These smartwatches will be upgraded to Wear OS 3.0 - 9to5Google
It's Now Easier To Use Google Keep On Some Wear OS Smartwatches
The 6 best Android smartwatches in 2024 - The Verge
Google's Pixel Watch is slated to handle Smart Unlock using its own companion app rather than that of Wear OS 3 - News