I haven't used Scratch but I think Godot might be one of the easier engines to get into compared to Unity and Unreal Engine. GDScript (https://gdscript.com/) is a custom language created for Godot and is similar to Python so it will be more complicated than creating games with Scratch since you will be writing out code explicitly rather than dragging blocks together. GDScript is immensely easier to use than C# (Unity) and C++ (Unreal), though.
It might be worth looking at GD Quest (https://www.gdquest.com/tutorial/godot/learning-paths/gettin...) to determine if it's something your kid would want to learn and get into. As a developer, I found it very easy to start to get started with Godot versus Unity and Unreal so it might be a fun adventure for your kid to start learning :)
I heavily considered purchasing a Lumia 950 when looking to upgrade my Android phone. Unfortunately, the community pretty much drove me away, not because they were toxic, but because they claimed the platform was dead and no one suggested getting into Windows Mobile 10. If Microsoft releases a new WM 10 phone with a fingerprint sensor and a decent set of specs, I might consider picking one up and bearing the "app problem". I like the fact that Microsoft updates the devices directly and I can go into a Microsoft store if I have a problem.
They might be worth looking into.