To answer the original question: All Dji drones have the factory 500m above liftoff height restriction.
And if you really, really want, and spend enough time (or money) on it, you will find a way to remove that restriction on any of the drones.
But I'm sure that if you try flying at 500m, you'll see that this is high enough. Personally I never even exceeded 200m. That is already high.
If you want a drone for very high altitudes, you should focus on selecting one which better deals with wind, and not on the software-only restrictions.
And if you really, really want, and spend enough time (or money) on it, you will find a way to remove that restriction on any of the drones.
But I'm sure that if you try flying at 500m, you'll see that this is high enough. Personally I never even exceeded 200m. That is already high.
If you want a drone for very high altitudes, you should focus on selecting one which better deals with wind, and not on the software-only restrictions.