Last month, OnePlus launched its OnePlus 9 and 9 Pro flagships, which we recently reviewed. At the same time, it also announced the OnePlus 9R (a reworked Snapdragon 870-equipped OnePlus 8T for India and China) and the $159 OnePlus Watch. This didn’t come as much of a surprise considering rumors of a OnePlus smartwatch have been swirling…