Had the same with our 2020. We'd stopped and were in Accessories mode listening to Sirius for a couple of hours - all hell broke loose on the dash with EV and other system failure notices, and wouldn't start. Waited about three hours, then turned the ignition on, off, open/close drivers door...
Thanks for sharing, and we're very sorry to hear about the issues you've been having. We're just starting with our first PHEV (2020 SE), up here in Canada, and really enjoying it. Hope to enjoy it for many years.
The US has really good lemon laws (DMV-dot-org), so if the car is one, you may...