Prime Video has a dedicated "Tamil Dubbed" section. They also produce original content dubbed into Tamil. Furthermore, they have a massive library of South Indian movies (originally Telugu or Malayalam) dubbed into Tamil.
Tamilplay is a third-party website primarily known for hosting a vast collection of South Indian films. It has gained popularity by offering: wwwtamilplaycom tamil dubbed movies full
Many of these sites require you to disable antivirus or sign up with fake credentials. They can harvest your IP address, location, and even personal data entered into forms. Prime Video has a dedicated "Tamil Dubbed" section