According to reports, Google has utilised a Samsung Exynos chipset for this autumn's Pixel Watch. However, rather than the Exynos W920 or newer, Google is alleged to have opted for the chipset found in the Galaxy Watch, Galaxy Watch Active2 and the Galaxy Watch3.
https://www.notebookcheck.net/Google-Pixel-Watch-to-launch-with-older-Samsung-Exynos-chipset-predating-the-Galaxy-Watch4-and-Galaxy-Watch4-Classic.619692.0.html