Does the camera power up and operate normally (except for some motor whining noise)?
If so, the broken housing front, nose piece, lens filter, antenna and microphones of your CGo3+ are the same as a later variation of the standard CGo3 camera. They can be replaced using the first and last few steps of a larger piece of guidance already contained in "Way To Fix Drones project". See Attachment 9 (CGo3 Core Assembly Replacement). You will only need to perform Steps 1 through 6 to remove the damaged cover, and Steps 31 through 38 to install the new one. A small Philips head screwdriver is required for the 4 screws.