To see the version of Realm you're using find the relevant dependency/SDK below:
Javascript: Run the command `npm list realm`.
Realm Object Server: Run the command `npm list realm-object-server`.
ROS cli: Run the command `ros --version`.
Swift / Objc: Follow the script here.
Java: Dependency versions can be found at path ./project/.idea/library.
.NET: Available through NuGet.
GraphQL: Run the command `npm list realm-graphql-service`.