https://www.apple.com/ca/newsroom/2021/11/apple-announces-se...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.
[1] https://twitter.com/marcan42/status/1484155025266180097