I can't receive a call on my Apple Watch 7 with cellular when my iPhone is turned off

By systemwide, I meant Verizon, not Apple.

Anyway, i finally figured out how to fix it myself without having to restore the watch from a factory reset. Inside the Apple Watch app on the iPhone, in cellular, I removed the Verizon cellular plan. Then I added it back. It took a little while for activation and two separate tries, but all is working now.

Pushing Verizon harder is worthless because the Verizon rep kept telling me repeatedly that he was the expert and the only thing to do was to reset the Watch to factory and restore it like a new watch. I could have kept calling different reps, but it’s hit or miss on finding anyone who knows any more than just that everything has to be a factory reset. The rep even started out telling me that I couldn’t do what I knew I could—that in order to ring the Watch people had to know the watch’s hidden number and the watch couldn’t be reached on the main number without being directly attached to the phone at the time. Pure lunacy and lack of any real training.