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I recently installed the Watch for Tesla. In my phone, I can use the Siri to open the frunk or other activities. But I can not use Siri in my Watch ultra. I found the Shortcuts do not sync to my watch from the phone. Does everyone have the same issues?
I use WFT myself - but not an Ultra yet. I have a S6 Watch so my plan is upgrade to an Ultra in September…so not super helpful for you right now. That said, the dev of WFT is very responsive on Twitter. So might try them there.