I want to insert a drive into the transform of the bone's head or object's vertex, but I can't insert it. Is it impossible to insert itself?
2020-12-20 updated
I found a way to drive the object's vertex. No bones. This is the link. Is it possible to add a driver to a vertex position?

2021-01-18
My update is too late. I thought I solved the problem, but it wasn't. I accessed the Outliner's Data API, but it was impossible to modify the value in Object Mode.
