To do so, go to Finance -> Expenses and click on the arrow to select Expense Types.
On the Expense Types dashboard, you can click on three dots of each expense to View or Delete it. You can also click on Create an Expense Type to add a new one.
When you click on Create an Expense Type, a drawer opens in which you should insert Name, Expense Type Category, and Xero Accounts. Finally, click on Create.