When I got my Ultra 2, I tried Double Tap a few times and it was hit or miss with it ever working reliably. After installing the watchOS 10 beta for 10.2 (I don't remember which build it was) Double Tap was working pretty reliably. After installing the 10.2 release candidate, I noticed a huge improvement. Your 2 issues were the ones that never seemed to work reliably. for me, especially phone calls, a heavily promoted Double Tap feature and an enhancement to a feature I've used on every Apple Watch by tapping the screen.
On watchOS 10.2, Double Tap seemed to improve dramatically. I love being able to use Double Tap with Music, Timers, Snoozing alarms, and especially phone calls. I still occasionally find times when it doesn't work, but a large majority of times I get that satisfied feeling and I don't curse Apple as much when it doesn't work.
I had given up on Double Tap before 10.2. Hopefully, Apple will get things sorted out for you and you'll be able to use it the way it's supposed to work.🤞🤞🤞
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