I have a doubt on this, when you are far away from your iPhone using only LTE on your watch, do you receive the same notifications that if you have your watch tethered with iPhone, also apps withouth watchOS App like WhatsApp? Thanks!
I just tested this and yes, you do still receive all the notifications on your watch and you can reply to notifications that give you that option, even when you are not with your phone. I believe the phone does need to be turned on and connected to the internet for this to happen, but it doesn’t need to be near the watch or connected to the watch.