You have one on Today screen, and you may find what you expect in the reports.

I imagine that all elements (meeting, action, question, ticket, ...) by project can may be automatically add in linked elements in "Project". I don't know if a good idea but I search ...

I imagine that all elements (meeting, action, question, ticket, ...) by project can may be automatically add in linked elements in "Project".

There is no need : items are alredy linked to the project because they depend on it.
Project sleector is there to give restricted view to given project.
Also, most reports have Project as criteria.