On an Access Control page, creating a Page Access User and assigning them to a Group the option to subscribe the user to all components

You can also create a Page Access User, and assign then directly to standalone components and will see the option to subscribe the user to those components

BUT, if you select components inside of a component group, that option does not appear. Does not matter if you use the Check All option, or if you directly check off a component in a group, the option simply doesn't show.