Apple Pay works fine on my phone, and I have set it up on my new UW2. According to the docs, double-clicking the crown should activate Apple Pay at checkout. But I’ve tried and failed to get it working at checkout three times now, because double-clicking the crown just brings up the task switcher, not Apple Pay (by task switcher I mean you see multiple apps at once as stacked thumbnails, which you can scroll through vertically).

I’m sure something is misconfigured, but what?