Are there surveillance cameras in aircraft cargo bays? I've heard that there are cameras on the fuselage and wings of some passenger aircraft. Is there a similar surveillance system in-built at the cargo bay/compartment of a passenger aircraft?

During the baggage loading / unloading of passenger aircraft, many burglary events can be experienced. I think that if there was a camera surveillance system, theft could be reduced significantly. At the same time, when the fire warning was received from the compartment, the pilot could confirm by monitoring the cargo compartment whether the warning was correct and avoid unnecessarily diverting. In addition, the perpetrators of compartment damage occurring in cargo loading / offloading could also be easily identified.

Why did the aircraft manufacturers not consider installing in-built cameras in the cargo compartment?
Any burglary of cargo would happen outside the aircraft, after unloading the cargo. External cameras on the ramp are much more effective for this purpose. I don't know of any aircraft that has internal cameras just for the cargo area.