Notification groups: how?

I changed iPhones and I notice that all of my automations don’t work anymore. I also want to receive notifications to my other apps (iPad, Mac). And sometimes I want to notify everybody in the household.

I wanted to create notification groups, but I cannot set it up as a Helper:

What am I doing wrong? How do I create various group of people for notifications?

https://www.home-assistant.io/integrations/group/#notify-groups

You are doing the right thing though. Using a notification group means you only have to change one piece of yaml when you change phones.