Hello there,
Probably not. When you use the Camera component you are technically inside your app but you're using the service of a different app - the default camera app of your phone. Therefore, you cannot control what the app can do.
However, what you can do is to build a custom camera that does not work with an external app. This will allow the user to preview and take the image through an arrangement as a "container", then you'll get the image. You will need a button to take the photo, and an arrangement to load the preview. This will require the help of an extension.
That is, unless if an extension developer can create an extension for this, or if there is an existing extension that I'm unaware of, but chances are, this is unlikely. Check out the Extensions Directory for a complete list of extensions.
Source: java - Keep flashlight ON while camera is opened - Stack Overflow