Thank you for the comments, everyone!
I don’t think there’s any Kryptonite in Emily’s reality. According to my pseudo-science, it couldn’t exist there until after Kara’s organelles triggered the transition from chaos to order in subspace, just like Kara couldn’t have powers until after that happened.
Jordy is following the same path as Clark in developing his powers; so far he doesn’t seem be any less powerful than Clark was at the same age. Kara got all her powers at once because the structure of subspace is different in Emily’s world. Clark noticed that difference in his powers in Chapter 41.
It’s not surprising that a different reality might have different rules. In the Silver Age comics I grew up with, Clark had all his powers as soon as the Kents found him, and was flying around as a baby.
“Aviary” and “Defoe” definitely contain clues. I don’t want to say any more right now.
There’s more on Kara’s origins coming up soon. Very soon.
