You can watch the movie Megan Is Missing on several platforms:

• It is available for streaming on Prime Video and MovieSphere+ Amazon Channel

• You can also buy or rent it digitally on Amazon Video, Google Play Movies, Fandango At Home, and Microsoft Store

• Additionally, it is available on Apple TV

Currently, some streaming services may not have it available, so checking these platforms or renting/buying digitally is the most reliable way to watch it