I'm assuming you're in the EU or UK, Apple is required by law to not include a power adapter:
https://appleinsider.com/articles/25/10/15/eu-gets-what-it-a...
In the US they provide one in the box free of charge.
Does the law say they have to charge for it.
Nope, they are required to have an option to opt-out from adapter. They choose to charge for one!
https://9to5mac.com/2025/10/16/no-the-eu-didnt-ban-apple-fro...