In the model 3 at least, the rear doors can also be opened without power by pulling a cable. Not as obvious as the front doors, I’ll say, but you will be able to get out.
https://www.tesla.com/ownersmanual/model3/en_us/GUID-A7A60DC7-E476-4A86-9C9C-10F4A276AB8B.html
That was added in this year’s model. All previous Model 3’s do not have manual release for the rear door. https://youtu.be/Cfk8Erx8Wiw?si=MGK94UX_qavyOuVr
Besides, having manual door open under a hidden panel in the bottom of a door pocket is ridiculous.
Mine is from 2019 and I have to actually tell people in the backseat to use the button and not the handle, because it’s so much more prominent.
The previous poster already showed the user manual where the BACKSEAT release is under a hidden panel at the bottom the door pocket.
I showed a video that the 2022 and older model 3 has no manual door release at all.
Again, BACKSEAT. The front seat has an easy access manual door opener.