Not sure if it is like that because I'm in Korea, but on my Samsung S9 Samsung is injecting ads for their new S24 in my notifications. I've had the phone for 5 years and this is the first time I see ads in my phone notifications, unbelievable.
It's so incredibly easy to disable, I'm not sure how people are justifying their phone choice based on the apps they have installed. It's not part of the OS.