Update
Why won’t it let me update it when I’m connected to WiFi?
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Why won’t it let me update it when I’m connected to WiFi?
Perhaps this article will help:
If you see 'Unable to Verify Update' when updating Apple Watch - Apple Support
What series watch do you have? What watchOS version is on it? How about the paired iPhone?
iOS 15 and gen 3 series 3
Update