This was announced in November 2021, but there hasn't been any development since. The cynic in me thinks this was just a PR move to quell EU right to repair regulations, but I really hope that's not the case.
Logistics likely takes time for all of this as well as the legal side of things. It's not as simple as "poof, self repair!" as much as Samsung and Google are making it seem with iFixit.
https://9to5mac.com/2022/04/08/what-happened-to-apples-new-s...
There are already hints that it's coming.
I am of the mind that self repair on a leased device will void agreements.
It doesn't hurt their bottom line, while able to please policy and regulators. The repair and components will be charged the same as BOM cost + margins. 99.9% of its billion iPhone user are highly unlikely to do self repairing.
So i dont think it is a PR move at all as in all words but no action. But they did make try to make lots of PR points out of it.
https://www.fudzilla.com/news/mobile/47872-cook-blames-users...
The current debate is thus over whether or not customer disgust with their declining ability to repair and upgrade their devices, and resultant lost sales, will do more harm to shareholder profits than lost sales due to people extending the lifetime of their devices by easily replacing batteries etc.