Just a cute little update for you guys. Today they came close enough to touch their chests and necks! I held the millet in the crook of my hand, and both came over for a nibble. As it was too far to reach by just stretching they each placed a toe on my finger, leaned over so their necks and chests were against my finger and chomped away! So exciting!
Edit to add: this was also on their door perch, I didn't have to lean into the cage for a change!