Why exactly is that not a feature that can be expanded to every currently supported iPhone?
Especially since you can already check it in the data logs on older phones.
https://www.igeeksblog.com/how-to-check-iphone-battery-charge-cycle-count/
The implication that having a cycle count on your phone is going to drive upgrades is bizarre.
“Hey, what made you decide to get the new iPhone?”
“It has battery cycle counts!”
I can see it already.