You can filter your To-do list so that you only see the items you want to see, using the sort & filter menu. Just uncheck any item types you don’t want to see.
If you have any items unchecked and hidden, you will notice that the sort & filter menu icon lights up.
From the sort & filter menu you can also choose to display all items, and to display or hide completed items.
See also: Sorting my to-do items