ForeverGOS I thought of giving GPS all the permissions, including the notifications one that only launcher has to test
The device & app notifications permission will be necessary when you use the watch to receive notifications, but I doubt that the app not having that permission would cause it to not connect.
ForeverGOS Iam afraid doing that ruins the whole purpuse of using GOS?
Some people might think so, but I personally don't. The "point" of GrapheneOS isn't to be a de-Googled OS. Though even if you do grant all of those permissions, Google still gets way less information about you since none of their apps are privileged.