This a good idea in theory, but many drones have major privacy and cybersecurity issues that can be more of a problem than a solution to your home security.
Beware of the drone! Privacy and security issues with drones | Infosec
Drones, or “unmanned aerial vehicles,” (UAV) have flown into our lives both for the consumer hobbyist and as commercial and military devices. The market for
Home security technology usually takes the form of smart cameras or intruder-detecting WiFi routers, but a new system from Sunflower Labs offers a more radical solution -- and autonomous drone which oversees your property.
This a good idea in theory, but many drones have major privacy and cybersecurity issues that can be more of a problem than a solution to your home security.
SpaceX is now offering data connectivity support for autonomous security drones.
https://www.teslarati.com/spacex-starlink-rdars-eagle-eye-security-system/
Amazon has a security drone that is designed for indoor home surveillance.
Drones can be excellent tools for perimeter security in residential and commercial buildings.
This company has created the first fully autonomous home security drone system. It doesn’t come cheap, though.
https://www.engadget.com/2020-01-07-sunflower-residential-security-drone.html