If you are located in India, JioCinema is a rapidly growing platform that hosts a massive library of regional and mythological content.
Believe it or not, one of the best ways to watch the show for free is YouTube. The producers often upload full episodes to their official channels to monetize through ads.
In India, the official digital rights belong to Disney+ Hotstar. While most content is behind a paywall (VIP/Super plans), Devon Ke Dev Mahadev is often partially available for free with advertisements.