You can watch all the races from the Derby Festival overseas via the Racing TV App. You will need to subscribe to the leading horseracing channel and register with a UK address. There is more here.
In terms of mainstream broadcasters, there is every chance you will be able to watch the Derby wherever you are in the world. The 2022 Derby was shown by more than 50 broadcasters, including the likes of Fox Sports in the US, ESPN / Star + in South America and Caribbean, SuperSport in Africa and Viaplay in Europe. A full list of confirmed broadcasters will appear nearer the event.