Spawn px4 instances of same drone with different properties

I am doing a research project on Swarm Drones using ROS2 jazzy and simulating the same using Gazebo Harmonic. While I spawn x500 drone using PX4 as 3 instances with camera, I can’t spawn them using 3 different topics, since I am using the same sdf model. What I need to do is, to create 3 instances 0,1 and 2 with publishing camera data to 3 different topics like camera_0, camera_1 and camera_2.
Any Ideas?