Welcome and good evening. My chickens get good feed - mashed (with water in it) in the morning and they get real food and treats in the afternoon, as well as free will dry feed. I keep track of needed vitamins, minerals, calcium needs, etc... Mine were aloof at first and I thought treats were a great way to connect, and know mealworms are very good for chickens.
But, as others have said, just sitting with your chickens, not trying to pick them up - not even paying attention to them unless they come up to you - was the most powerful connection I made with my chickens.