What you did is what I meant by changing it in the world outliner. That capsule is the root component in the blueprint so when that is scaled, everything that is a child of it will also get scaled. So where it shows “Mesh” under CapsuleComonent, that would be the skeletal mesh for the arms and gets scaled with the capsule.
Is the issue you’re having, is that you’re left with jumping up small ledges and stairs?