In To-Do, you can manage your projects.
You can manage them by clicking here:

You can sort the projects by last updated task, name, or creation date.
You also have the capability to:
- Rename
- Delete (all the tasks on this project will be removed): only the owner can remove the project.

To confirm the deletion, you have to enter the name of the project to ensure your action is deliberate. When open tasks remain, you can access the task list for this project before deleting it.

You can also access the task list of this project by clicking on its name.