Yet another success!
Thanks for providing feedback with your results. 40 minutes into a weekend is not really that bad. Always better results in the weekday mornings. Yes, you have to complete the Set Up Cellular function from the Watch app on your iPhone. This step is what actually downloads the information into the Watch to activate the eSIM with the ICCID information for Cellular service to actually work. It also sets up the NumberSync between your Watch and your iPhone.
Dave