When you open an action card you can see all the projects it is linked to. It is instinctive to want to click on the linked project name to navigate there if you have access or to a screen to request access from the project owner since you are working on a related project.
Currently you need to come out of the card and search for the project if you have access. If you do not have access it is not always easy to know who to ask for the access which then undermines the efficiency and frictionless nature of Hive.