Occasionally seems to have 1 or 2 on it, often nobody, although it seems to be booked to be a decker - certainly in the mornings, the bus working it runs onto the 39/40.The 68 from Four Lane Ends to the DSS has that beat time-wise, at four minutes each way: https://bustimes.org/services/68-four-lane-ends-metro-dss-tyneview-park
It was probably once quite a popular route but I haven't witnessed many folk on it whenever I've gone through Four Lane Ends in the peaks.
Four lane ends bus station also used to see a service to the nearby Quroum business park (the 555) which used to be timed at 5 mins one way and 4 mins the other, although it was dropped a while back.