Is there a way to re-enable them?
Yes:) Go to the old scene that was created earlier, select the tab where the cameras were located, go in, and you will see the cameras that were created earlier. You need to select the desired camera again, that is, click on the button with ...
That's basically it. In 80% of cases, the camera will reappear. You could also just copy the string.
Such cameras cannot be edited through E, of course.
