I search to let connected user see some project where they have no roles to request a role.
Currently, users can view projects where they have a role. And not the others at all. I would like project administrators to be able to say "show that my project exists", but without giving access to the project. And that users can see a list of all those projects where they have no role but at least can see the name of the manager to request one from
Roles that grant access to the "browse projects" permission provide access to project content.