It may have taken Google and Samsung the best part of a year, but Google Assistant is finally available on the Galaxy Watch4 and Galaxy Watch4 Classic. Initial tests are not all that convincing though, especially compared to older Wear OS smartwatches with the last generation version of Google Assistant.
https://www.notebookcheck.net/Wear-OS-Next-generation-Google-Assistant-is-not-a-resounding-success-on-the-Samsung-Galaxy-Watch4-series.622652.0.html