It seems not.
There are pins on the OV2640 that are RESET and PWRDWN, but none are connected to GPIOs on the XIAO ESP32S3, so nothing doing there.
The ESP32CAM does power down (and thus reset) the camera by turning off the voltage regulators.
The code for the camera is mostly hidden in a *.a file so there is little detail of the actual comms.
There are commands to apparently deint the camera, esp_camera_deinit(void) but all the info I can find on githubs etc say that that command does not work.
The accepted narrative appears to be that once initialised the camera cannot be de-initialised by software, in that the camera library code provides no workin mechanism to do so.
Sure ?
If its easy then where is the published code ?