Does he like sunflower seed? Does he like toys? I think tiels don't know what they like and they change their mood very often. My second tiel didn't like spray millet and didn't touch it at all for 2 months, but suddenly after seeing my other tiel eating eat, he started eating too and now he loves it.
Maybe you tiel has other likes! You need to pay attention.
If anything else fails, you can study his seed feed. Take some out, and put all seeds in little groups on a table/ hard surface. (ex: sunflower seeds, millet seeds, saflower seeds etc.) and check which seeds your tiel eats first and second. After you see that, you take those particular seeds out of his seed diet and keep them as treats. Your tiel will still eat the second type of seeds and the rest.
Or you can try rewarding and playing with him with his favorite toy! Since your tiel is still new, you still need to discover a lot about him!
I would let him stay on the rods and chill. He is still too new for him to want to spend all his time with you. So he needs his space. You can try target training for your bonding session, and after that you let him chill and do his bird things for the rest of the day.