Thanks for the reply, I do realize what you are saying but according to Apple, they support both (textKit1 and textKit2).
https://developer.apple.com/videos/play/wwdc2021/10061/ (minute 2:08)
For instance, you can change this in a TextView under the text layout option (image attached), please see this for references: https://developer.apple.com/videos/play/wwdc2022/10090/ (minute 5:24)
That said, if Apple supports this, do they support changing this in a UILabel? yes? no? if not, why not?