Regular autoflowering plants are usually small and will yield somewhere from 10 to 50 grams per plant with some exceptions that can manage up to 100 grams a plant but that goes into the bigger autoflower territory. I've seen one grower here get 9 oz off an auto flower. Light and growing environment will always play a big role in what you get. Along with the strain you choose.
The yield depends on several factors. Like, when the seed was planted, the daylight schedule during its grow cycle, size of pots (or if you’re planting in the ground), bugs/pests, etc... But I typically get 2-3 oz per Auto.