Unable to change Tangent type on keys when in curve editor

In the animation tab, I can change a keys tangent type in the dopesheet but when I switch to the curve editor, I only get the option to ‘Add key’ when I right click on the selected key.

I’ve only noticed this in the past week or so and I know that you used to be able to change the tangent on a curve as it is shown in the ‘editing tangents’ section of this unity manual Unity - Manual: Editing Curves

I’ve not made any changes to any settings, unless a change has been automatically made without my knowledge. Using 2022.3.5f1.