See the following from Buy iPhone 12 and iPhone 12 mini - Apple
As part of our efforts to reach our environmental goals, iPhone 12 and iPhone 12 mini do not include a power adapter or EarPods. Included in the box is a USB‑C to Lightning cable that supports fast charging and is compatible with USB‑C power adapters and computer ports.
We encourage you to re‑use your current USB‑A to Lightning cables, power adapters, and headphones which are compatible with these iPhone models. But if you need any new Apple power adapters or headphones, they are available for purchase.
Also note that Samsung is not shipping a charger with their new S21 Ultra (and possibly other models) either.
See the following from the "What's in the Box" section of
https://www.samsung.com/us/smartphones/galaxy-s21-5g/buy/galaxy-s21-ultra-5g-128gb-unlocked-sm-g998uzkaxaa/?hideDevice=galaxy-s21-ultra-5g
What's in the Box:
1. Galaxy S21 Ultra 5G
2. C to C Data Cable
3. Ejection Pin
* Phone model and color varies based on selection made.
** Wall charger sold separately.