That pot is HUGE and the Haworthia (or hybrid) looks very happy. Makes me think too low light and too much water as Haworthia like less than full sun and more water than a cactus. Grow lights, unless you have to wear your sun glasses when they are on, are no substitute for sunlight.
Your potting soil looks like compost, way to organic for a happy cactus. The pot should be just larger than the root ball. I suspect a 6 inch pot would have been a better size. Hopefully, its not too late to save the cactus.