We kindly request you to check the item type which you have selected while creating the item.
To check please follow the below mentioned steps:
To make changes, please check the below shared steps:
Step 1 : Go to Products & Service section.
Step 2 : Enter the Item name in search box.
Step 3 : Click on Edit.
Step 4 : If the item type is selected as Service, change to Product >> Update Item.