How many subjects can DJI RS 3 Pro follow using ActiveTrack?

One.

Related Questions

What is the maximum number of devices that can be connected at the same time when using DJI FlightHub 2?

There is no limit.

What is the best drone for professional filming?

We recommend the following drones for filming and shooting cinematic-quality content...

Best drone with a thermal camera?

Among the top choices for a thermal drone are the DJI Matrice 4T, Matrice 4TD, and the Dock 3 with M4TD.