Google has confirmed that the Pixel Watch 3 is unable to be repaired. If you have a hardware problem, you'll need to get it replaced. Nobody should be surprised because this is the third version of the Pixel Watch and the third one that "can't" be repaired.
While I'm sure someone with enough determination and a steady hand could take a Pixel Watch 3 apart to replace broken or faulty components, realistically, Google is telling the truth when it says it can't be repaired. All wearables are packed full of small parts bonded together in a way that requires machinery to assemble, so cracking them open isn't easy. It would be far more cost-effective to offer a replacement. While Samsung and Apple may offer some types of service for their wearables, it's not cheap. It can't be cheap.
