I used the code in this thread. Added the "Privacy - Camera Usage Description" to both my app and the Camera extension. You also need to make use you ask for the camera permission in the app before using the control. Otherwise it will always open the app.

Hi, Thank you for this information! Is it possible to open the app to a specifiek screen? For example using a deep link. I want my users to take a picture when the control is pressed. Ether using the flow already existing in the app or using the capture extension.