I swear SE used to support functionality where when user moved cursor adjacent to block-scope character ( () {} [] etc), for a moment either the cursor would flash to the matching scope entity (as if user hit ctrl-] twice, but automatically) or briefly highlight the range of code between the pair. Essentially upon the cursor reaching adjacent to either of the scoping pair chars, it would act the same as if ctrl-] had been pressed, and do whatever the editor prefs said to do in that circumstance. However, I cannot currently find any easy pref to enable SE to do the same functionality today (in v21 or v22b2 or v22b3).
Please consider adding (or re-adding, if it was removed) this functionality, as it is quite useful for quick visual reinforcement of scoping. The problem with having to hit ctrl-] is that when mousing it requires switching to keyboard, as finding and executing the corresponding menu operation twice is anything but convenient ("click for menu, scroll down search menu nearly to (but not at) bottom" x2).