The nectar flow has or will be coming to an end. Your bees will search for nectar as best they can. They are beginning to prepare for the winter and get as much stored up as possible.
As the beekeeper, you will be harvesting soon. some may want to test and treat for mites this month. Not a great idea if you have honey supers on as you don’t want to contaminate your supers with any chemicals. It would be best to first harvest your honey and then treat for mites either chemically or with powdered sugar. If you are finding that the bees are not storing honey in your upper supers, you may be honey bound. Move the middle frames of honey UP to the next super replacing the lower ones with empty frames to encourage them to move up and fill more supers.