As of now, Brightburn (2019) is available for streaming on various platforms, but availability can vary by region. You can check the following services:
1. Amazon Prime Video – You may be able to rent or purchase the movie.
2. Netflix – Depending on your region, Brightburn might be available.
3. Hulu – In some countries, Brightburn may be available to stream with a subscription.
4. YouTube Movies – Rent or buy the film to stream.
5. Google Play Movies & TV – Available for rental or purchase.
I recommend checking these platforms directly or using a streaming aggregator tool for the most up-to-date information based on your location.
