Hi, I also would like to make a request on a course using Godot to create 2D skeletal/bone animations. Please let me know, thanks. 
As a Blender user, I would say. See also Blender Grease pencil and bones (armature).
Which is 2D animation in a 3D environment
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I voted, so hopefully this gets seen. In the meantime, I recommend checking [this] out in case it covers what you’re trying to do.
I’ve checked this one out. However, the entire Godot documentation there seems to be right now out of date following v4.6 of Godot, and I wish someone available could please update this entire documentation, and that’s all.