If you can’t see a project when viewing All Projects, or adding/editing Timesheet Entries & Expenses, first check and make sure you are a member of the project and have the appropriate role.
You can request the Project Manager or Administrator to add you as a member to the Project you wish to see.
In case of time tracking, make sure you are given Timesheet access at the Project Settings level.
Interested in learning more about Avaza Projects? Here is a guide to Getting Started with Projects.