I’ve found identical same malfunctions as @InesM1912
Xiaomi Mi 9T (davinci)
/e/ Recovery V1.7 and cameras faulty
/e/ Recovery V1.7 and cameras faulty
I got the Mi 9T (davinci) with /e/OS ‘Q’ e-1.3-q-20220825213388-dev-davinci for repair because the motorized pop-up front camera was not working
Error messages: Main cam: unable to access camera + camera cannot be toggled (selfie camera).
Next, I installed the latest available stock Android 10 (Global). Both cameras work!
Now I tried several times in vain to boot into e-Rocovery V1.7. With the installation of TWRP Recovery V3.6.2_9-0 I was able to boot into TWRP on the first try and install the /e/OS ‘Q’ V1.7.
The test with the Simple Camera Abb from SimpleMobileTools was also negative. But again both cameras do not work. Both times the same error message as above
Now installed for test crDroidAndroid-11.0-20220402-davinci-v7.16. Both cameras work.
The source of the error is clearly from the /e/ software.