2D Extendable Vaulting Pole Physics (Power Pole)

hullo, I’m working on a 2D plattformer where the player has a pole that extends when left click is held and retracts upon release. Very similar to Goku’s Power Pole where the player can push himself off the ground and sway back and forth on it.
I’m struggling a bit with the physics interactions of the pole. unity doesn’t seem to like resizing collidors dynamically during runtime. and i’ve tried activating a hingejoint2D upon contact with the ground but haven’t gotten it to work properly.
Does anyone more experienced have any recommendations how one could implement this mechanic?

Here’s a beautiful sketch to visualize what i want to achieve: