Studios rarely invest in dubbing older Hollywood films into regional languages unless there is significant demand. Troy (2004) was dubbed into Hindi a few years after release, but Tamil and Telugu dubs remain unofficial or fan-made. The best way to change this is by legally streaming the movie and using platform feedback features.
The Rise of Tamil Dubbed Hollywood Classics: A Deep Dive into "Troy" (2004) on isaiDub Troy -2004- Tamil Dubbed Movie Download isaiDub