A Reddit user with a Pixel Watch 4 LTE was among the first to get version 4.2.12 of the Pixel Watch Faces app straight from the Play Store, Android Authority reported. It unlocks Weave, Chronograph, Multicolor Modular and Multicolor Reveal, the faces that debuted on the Pixel Watch 5, plus the Stephen Curry face that first shipped only on the special-edition Watch 5. Google's AI face maker comes along too. You describe a design by text or voice, and it builds the colors, patterns and digits, though it can't change the layout or make an analog face.
Until now, getting these faces on a Watch 4 meant sideloading, which takes ADB, a developer tool, and wireless debugging. The update is arriving gradually, and some owners still can't see it. Older Pixel Watches aren't getting the faces so far. If you have a Watch 4, check the Play Store for a Pixel Watch Faces update, then open the face editor in the Watch app on your phone.