Totally agree with this comment. I'm astonished by the lack of this option, that's completely unacceptable that it is impossible to choose where the notification are ringing !
Since I have an Apple watch I miss a lot of important notifications in my daily life because my iphone is not ringing anymore on incoming notifications.
I can't understand that it is not possible to choose "receive notification on Iphone, on iWatch or BOTH !".
I know that there is an option which allows to have the notifications again on the iphone but it disable a lot of important watch features ! That's not an acceptable answer.
I also read your article about "Where notifications appear"
About notifications - Apple Support
This is just crazy in term of ergonomics! You need to write an article for people understanding how the logic work ! And even knowing how it work, you'll never be sure of where the notification will come !