Each product has a status:
Draft - not visible to anyone
Active - visible in your published store
Archived - not visible to anyone, only shown in the Archived tab in your dashboard
To make a product available for purchase:
Ensure all required fields are complete
Set product to Active
Missing assets (like color images) can prevent activation.
You can also archive a product if you wish. You can always find it again from the Archived filter tab on the Products page.