Hi @Ariadna , it sounds like you are viewing the Calendar tab within a Team (in which you have various Projects), right? Unfortunately this view is not available on the mobile app.
The only way to replicate a Team Calendar view in the app would be (on the browser/desktop app) to create a ‘Master’ project where you add all the tasks from all your projects into it. Then all your tasks would appear in the Calendar view of the Master project on the mobile app (as long as these tasks have a due date).
You can also automate all new tasks added to your projects to ‘multihome’ to the Master project by adding a single rule into each project so that ‘when new tasks are added → add to Master project’. But you will need Asana Business tier to create these rules.
Have a look at this post for the best way to multihome tasks. You can skip step 5 since you will be adding and not moving tasks to your Master project.