Just FYI all the Tesla cars to my knowledge need power for the doors to open because the handles aren’t physically attached to the door mechanism. They’re all electronic. If you own one of these cars I highly advise you to read the manual and find out where the mechanical door releases are(they’re somewhat hidden).
Another fun fact and this isn’t exclusive to Tesla. If you pay attention when you open the door the window retracts a tiny bit to clear the weatherstripping. If you have no power that can’t happened. What is unique to Tesla as far as I can tell is that their weatherstripping isn’t as large/pliable as other manufacturers or maybe it’s just the assembly. Using the mechanical release with power still retracts the window. In the event the battery is dead or damaged from an accident using the mechanical release requires breaking the window. That means the door is significantly more difficult to open.
I mentioned the retracting window isn’t exclusive to Tesla. The issue is with how they work when they no longer retract and that appears to be a Tesla problem. It’s not an issue if the window has power.
Tesla forum No power, broken window.
Random article where parts of the car had power and others didn’t. Broken window as result.
Another article about broken windows using the mechanical release with lack of power.